Friday, 22 May 2026

A Long History of Healing

As the site faces a new chapter, LHSA Manager Amy has been looking into the history of Astley Ainslie hospital...

Astley Ainslie Hospital was built on a site that has been associated for centuries with the care of the sick. The Burgh Muir covered the area bounded by Leven Street, Colinton Road and Myreside and the edge of Craiglockhart on the West; Dalkeith Road to the East; The Borough/South Loch (now the Meadows) on the North and the Jordan Burn to the South. 

The Burgh Muir, then part of the ancient Forest of Drumselch, was used as a hunting ground for many Scottish Kings. It was there that whilst hunting deer that David I was separated from his retinue and confronted by a fierce stag. Muttering a prayer for his safety, David saw that a cross had appeared above the stag’s head and it fled into the forest, leaving the King unharmed. David founded the monastery of the Holy Rude, Holyrood Abbey in 1128, in thanks for his deliverance he also gave Edinburgh its Royal Charter in 1143 and the Burgh Muir to the town as a gift.

During the period of the Black Death, the Edinburgh Town Council issued an edict stating that those infected with the disease were to be taken to a more secluded part of the City, then part of the Burgh Muir. People were quarantined there and very often died and were buried nearby. Small wooden huts, serving as makeshift hospitals for quarantine were erected to house the victims. Water from the springs around what was later to become Astley Ainslie Hospital, provided water to clean the clothes of the plague victims.

Artist's impression of St Roques Chapel, Edinburgh by Francis Grose (1731 - 1791). Courtesy of National Galleries of Scotland

In c. 1507 a small chapel dedicated to St Roque (or Roch) was built on the Burgh Muir on a site now occupied by the Astley Ainslie grounds. The chapel was reputedly built with support from James IV; he did visit and made a donation. The chaplain appointed to the chapel also tended to the sick and dying. During the plague epidemics, Edinburgh Town Council appointed ‘Medical Officers of Health’, two of whose names are recorded as Dr James Henrysoun and Dr John Paulitus. The last outbreak of plague in Edinburgh was in 1645.

 St Roque’s chapel fell into disuse after the Reformation and was demolished in around 1749, vanishing completely by 1791. It is believed that the chapel stood somewhere between the Children’s Unit and the school. [The Astley Ainslie Community Trust website has more information on St Roque’s Chapel and St Roque’s House, the latter purchased by the Astley Ainslie Trustees to expand its activities in Occupational Therapy.]

Parts of the Burgh Muir were feued out as lots during the reign of James IV. One of these was the 65 acres of the former Caanan estate.

I.               Famous medical residents

In the 19th Century, before the establishment of the Astley Ainslie Hospital, the area was home to many of Edinburgh’s wealthier residents – University professors, writers and medical men.

In 1842, Professor James Syme, Chair of Clinical Surgery at Edinburgh Medical School bought the villa of Millbank. In addition to the Chair of Clinical Surgery, Syme also became Junior Assistant Surgeon at the Royal Infirmary of Edinburgh. He held these posts until 1848 when he was appointed Professor of Clinical Surgery at University College London, but he returned to Edinburgh and was reinstated that same year after finding that he was expected to also carry the Chair of Systematic Surgery in London. In 1868 due to the adverse sanitary conditions in the High School Yards site, he argued for the building of a new Royal Infirmary. Joseph Lister, Surgeon and pioneer of antiseptic surgery, trained under Syme and became a close friend and colleague, later marrying Syme’s daughter, Agnes, in 1856. The wedding took place at the Syme family home of Millbank.

The building known as Morelands was once the home of Professor John Thomson (1765-1846). In 1804, the College of Surgeons of Edinburgh established a professorship of surgery and Thomson was the first to be appointed to this post. In 1806 he was appointed regius professor of military surgery at the University of Edinburgh.  Later in his career, in 1832, he became professor of general pathology at the University of Edinburgh.  

II.             Astley Ainslie Hospital, founding and early years

In 1900, Mr David Ainslie of Costerton, Midlothian died leaving instruction to his Trustees that the residue of his estate, after a lapse of 15 years, was to be applied ‘to the purpose of erecting, endowing and maintaining a hospital or institution to be called the Astley Ainslie Institution, for the relief and behoof of the convalescents of the Royal Infirmary of Edinburgh.’ Ainslie’s will stipulated that the bequest should accrue interest for at least 10 years. 

 

David Ainslie

The outbreak of WW1 meant that the conditions of Ainslie’s will were not concluded until 1921, when the Court of Session in Edinburgh approved a Deed of Constitution and Trust, including provision for the prospective hospital to be established with a board of governors. It was originally known as Astley Ainslie Institution and the focus of the hospital was very much on convalescence – it was not aimed at those suffering from long-term or incurable conditions, but at those who would ultimately make a full and permanent recovery.

A site was acquired on the south side of the city, consisting of several mansion houses and their grounds: Millbank, Southbank, Canaan House and Canaan Park. (Morelands and St Roques House and their grounds were added later.) Thirty-one acres of the Caanan estate was purchased by the Board of Governors in 1921.

As shown on this extract from Robert Kirkwood’s map of 1817

Courtesy of National Library of Scotland

As well as the houses and gardens, a nine-hole ladies’ golf course was included in the purchase. The trees, planting and stone boundary walls were to be kept in situ as they were. Of the original villas, Canaan House (The Administrative Block), Canaan Park, St Roque and Morelands survive today.

III.            The opening of the Astley Ainslie Institute

In 1923 an experimental unit of 34 beds was opened by Lady Susan Gilmour in Caanan Park. From the outset, the emphasis was on light and clean air, inspired by the example of Continental sanatoria. The Institution's location on the outskirts of the city allowed patients to benefit from the quiet and from fresh, air.  An article from the Nursing Times in around 1926 described the entrance hall of Canaan Park House as having a piano and that it was ‘bright with pots of growing chrysanthemums”. The interior colour scheme was generally ivory white and green – colours chosen for their calming and restful qualities. 

Caanan Park Pavilion

 

The first medical officer was Dr Mary Mears. She was later appointed as assistant medical superintendent, a post she held for 25 years. She studied medicine at Edinburgh University and graduated in 1921.
Mary Mears

By 1930, 120 beds were available. It was agreed that the existing Infirmary Convalescent House at Corstorphine would be used mainly for patients requiring a short convalescent period before returning to normal life. The Astley Ainslie would provide for those requiring longer care and supervision to fit them for a normal life; it might also occasionally take in infirmary patients who needed to be built up for surgery; it would not be used for patients with a chronic disability or debility due to old age, where a return to normal health would not be expected.

IV.           The hospital starts to grow

The East and West Pavilions were opened in 1929. These purpose-built single storey wards used a 'butterfly plan' with extensive verandahs to three sides for 45 female and male patients, respectively.  These were very spacious and airy. The same year, the first medical superintendent, Lt-Colonel John Cunningham, was appointed.​ Cunningham came from a very well-respected scientific family. He was the eldest son of Professor Daniel John Cunningham, who was a demonstrator in Anatomy at Edinburgh University, 1876-1882, and Professor of Anatomy at the Royal College of Surgeons of Ireland, 1882, at Dublin University, 1883-1903, and at Edinburgh University, 1903-1909. He carried out original research in human and comparative anatomy as well as in the wider field of anthropology including giantism and right-handedness and left-brainedness. 

John Cunningham

John Cunningham was educated at the Loretto School, Epsom College, Trinity College, Dublin and Edinburgh University, and entered the Indian medical service in 1905. He worked in various laboratories, saw service on the Indian North-west Frontier during the First World War and became Director of the King Institute, Madras, 1919-1926, and of the Pasteur Institute, Kasauli, 1926-1929. He was also the Organising Secretary of the Seventh Congress of the Far Eastern Association of Tropical Medicine held at Calcutta in 1927.  On his return to Scotland, Cunningham became the first Medical Superintendent of the Astley Ainslie Institution, a post he held until 1948.

In 1930, he was elected as a Fellow of the Royal Society of Edinburgh. On retirement from Astley Ainslie, he became Chairman of the Board of Management for Astley Ainslie, Edenhall and associated hospitals. In 1954, he became an Hon. Fellow, World Federation of Occupational Therapists.

The Scientific Unit, opened in 1930, with laboratory, X-ray, artificial sunlight installation (very important in Scotland!), gymnasium, dispensary and dental room.  The nurses’ home was completed in 1930, a two-storey and attic, H-plan building, built on the site of South Bank House. (original house was demolished)​

From the outset, the focus of the Astley Ainslie was on rehabilitation and rest, ensuring that patients were only allowed home when they were fit enough to do so and it was clear, even in a pre-NHS Scotland, that general hospitals did not have capacity. Newspaper coverage of the time very much echoes the pressures currently experienced by the NHS today:

 "...pressure on existing hospital accommodation means patients can't be kept for more than 2-3 weeks...insufficient to build up patient's health... without fear of relapse...result is that in many cases, particularly among working women, the daily task is resumed before the patient is fit for it." ​

Scotsman, 1930

"The great pressure on the beds in our general hospitals, as is evidenced by their heavy waiting lists, is... contributed to by this class of case... the "ins and outs." [readmissions] ​

Scotsman, 1930

 

V.             Occupational therapy

In the early 1930s, Canada was already renowned as a pioneer in the field of occupational therapy.  John Cunningham invited Miss Amy DesBrisay of the Toronto General Hospital staff to work at Astley Ainslie to develop an occupational therapy department. In 1933, Mabel McRae arrived from Canada as the first permanent occupational therapist. By all accounts, Mabel was a force of nature – see ‘The Astley Ainslie, Mabel McRae, and the Canadian Connection’ by the Astley Ainslie Community Trust https://www.aact.scot/history-blog/the-astley-ainslie-mabel-mcrae-and-the-canadian-connection

The Occupational Therapy Unit, the first of its type in Scotland, opened in 1936 

For adults, the east wing was dedicated to 'quiet' crafts, such as weaving, painting and basketry; the west wing for noisier activities such as carpentry, pottery and metal work.  Patients confined to bed could enjoy rug making, painting, wood carving and leather work, needlework and knitting.

The importance of occupational therapy was thrown into sharper focus following World War II. The Scotsman reported that John Cunningham “drew attention to the impetus given to the rehabilitation of disabled people because of the …. increased social consciousness in recent years, and still more because of the urgent demands for manpower brought about by the war”. He added that the “treatment may have a psychological, remedial or educative aim. Whenever possible, it should be started while the patient is in bed, to keep up muscle tone and to arouse interest in something outside the illness” (13 November 1944).

Scotland’s first Occupational Therapy training course was opened at the Astley Ainslie in 1937.

Dorothy Bramwell was one of the first four Occupational Therapists trained at Astley Ainslie. In 1939, she left Edinburgh to attend her sister’s wedding in Malta, only to be evacuated to Egypt when Italy entered the war. She ended up spending the duration in Egypt, putting her training to immediate use helping servicemen to recover from their injuries, shell-shock and battle fatigue. In her obituary, it was reported that men who were, in some cases, unresponsive to human contact reacted well to her therapeutic skills and a flock of budgerigars which she took with her in the wards. During the war, she was instrumental in developing the occupational therapy service across the Middle East and was awarded an MBE in 1944.

On her return to Edinburgh, she found herself at the centre of Astley Ainslie’s occupational therapy service – the Canadian OTs, who had remained to support casualties during the war, returned to Canada and Dorothy became both head of Occupational Therapy and the Director of the OT training course – positions she held for 20 years.

For more about the history of occupational therapy, see our earlier post here:   https://lhsa.blogspot.com/2014/11/occupational-therapy-history-behind.html

VI.           Military Service

During the Second World War Astley Ainslie was closed to convalescent patients and became a military hospital. In 1939, Astley Ainslie was taken over as part of the Emergency Hospital Service and military patients began to be admitted on 28th October 1939. 

Wooden huts for military patients

Small wooden huts were built in 1940 to provide more accommodation for the Military Hospital. The minutes of a meeting of January 1940 with the Department of Health for Scotland suggests that the transition to admitting military sick was quite fraught at times and that there was some concern expressed regarding the necessity of enforcing discipline amongst some of the military sick. The appointment of a Military Registrar to oversee the military sick seems to have been the subject of some friction with the Governors of Hospital. 

Astley Ainslie Hospital was designated as a Casualty Clearing Hospital for air raid casualties., but as there were fewer than anticipated, it became a general military hospital.

Towards the end of Oct 1944, there was a suggestion to change the name of Astley Ainslie from Institution to Hospital, to better reflect its nature and function.

In 1946, St Roques House was acquired for the Hospital by the Trustees. It had been the home of William Ivory, a member of the Botanical Society of Edinburgh and responsible for many of the fantastic specimen plants and trees in the gardens, including the giant redwoods. A little later, the villa known as Morelands to the east of the site was added to the growing hospital site.  

VII.         Post war constructions and beyond

In 1948, Astley Ainslie Hospital became part of the newly established National Health Service and started to receive patients from other hospitals as well as from the Royal Infirmary of Edinburgh.

During this period, the hospital came under the administration of South Eastern Regional Hospital Board and in 1954 it was linked under a single Board of Management with Edenhall Hospital, Musselburgh. In 1974 it became part of the South Lothian District of Lothian Health Board. 

Tyne Lodge opened in 1955 as the hospital’s first outpatient unit. The Tyne Lodge General Register of Patient (LHB35/4/3) records individual patients' attendances at the Rehabilitation Unit.

One unusual facility was created in 1959 when the National Coal Board designed, presented and installed a model coal face (inside a corrugated steel tunnel). It came complete with a coal face with roadway, seams, a bogie and rails, representing the cramped working conditions and atmosphere of a coal mine. The idea was to help injured miners return to work; at the time it was estimated that one miner in four was off each year through industrial injury. LHSA’s collection of National Coal Board Medical Cards (GD46) is a valuable source that provides insight into the numerous cases in which miners got injured or became physically disabled between the 1940s and 1980s. Amongst the most recurrent injuries and disabilities are slipped discs, punctured thumbs and big toes, strained backs and knees, bruises on feet/hands/arms, pustules on the knees, cut forearms/fingers, abrasion to fingers/legs/shoulder blade, jerked back/lumbar area, chest pains, and burst fingers.

For more on Tyne Lodge and the National Coal Board service, see: https://lhsa.blogspot.com/2025/03/disability-livelihood-and-employment-3.html

The Home Unit

The Home Unit was opened in 1960. An article in the Scotsman at the time articulated very neatly the ethos of Astley Ainslie as a place of rest and recuperation; the new home unit was focussed on “caring about the patient, rather than just for the patient.”  The unit provided a modern approach to rehabilitation and was kitted out with an assessment room, bedsitting room, bathroom and kitchen and equipped with gadgets and furniture to support disabled housewives/patients to reorientate prior to returning home. Staff also conducted home visits to arrange suitable equipment, and any structural alterations were requested via the Council (as they are now). During its first year more than 162 patients had been supported through the Home Unit and its facilities.​

The Charles Bell Pavilion was built in 1965 originally as the Children's Centre. It was constructed at a cost of £238,000 and was designed to treat children from 18 months to 15 years. It was the first of its kind in Scotland, providing physiotherapy, occupational therapy and speech therapy, where needed. Children were able to attend school, including taking standard examinations, whilst they were at the hospital as there had been a school on site since 1957.

The Scottish Driving Assessment Service (SDAS), like the Home Unit, enabled patients to adjust to  life with a disability or after illness or injury.  Established in 1983, the service was one of the first of its kind in the UK and has continued to be a vital resource for those seeking to drive safely again. 

The service was initiated by Dr John Hunter, who aimed to raise funds for the establishment of a driving assessment service during the International Year of Disabled People in 1981. 

The first patient was helped by the service in August 1983, and by the end of the first two years, sufficient evidence was gathered to present a paper at an International Conference and apply for ongoing funding as a ‘New Development in Healthcare’. The service has grown since then, providing assessments and advice on driving fitness for individuals with various medical conditions and disabilities, ensuring that those with a disability can continue to drive safely and independently.

VIII.        SMART Centre

The South-east Mobility and Rehabilitation Technology (SMART) Centre opened in 2007, continuing the work and legacy of pioneers like David Gow and David Simpson, Director of Rehabilitation Engineering Services (RES), using engineering and technology to support patients’ rehabilitation. SMART Services was the result of the integration of two groups of services that were formerly on two separate sites: RES and the Mobility Centre.

In 1969, RES was renamed the Bio-Engineering Centre. As well as their pioneering work in creating externally powered prostheses, the team also began to create externally powered disability aids, such as feeding aids which helped disabled people eat independently. Dr David Simpson was the first ever Director of the Centre.

In 1988, the Lothian Health Board was given oversight of the Bioengineering Centre by the Scottish Home and Health Department. That same year, they created an umbrella organisation called Rehabilitation Engineering Services for the Lothian Area (RELSA). The Bioengineering Centre continued to be based in the Princess Margaret Rose Hospital, but this restructuring linked the Bioengineering, Prosthetics and Mobility departments together under one organisation. It was later renamed Rehabilitation Engineering Services (RES) dropping the Lothian Area remit to represent the restructuring of NHS Trusts and reflect fact that they catered to the needs of disabled people throughout the UK and even internationally.

The Bioengineering Centre was moved from the Princess Margaret Rose Hospital to the Eastern General Hospital in 2002, when the PMR closed. However, the Eastern General Hospital was also scheduled for closure. The Bioengineering Centre and the Prosthetics Services were the last services operating on the Eastern General site before it closed altogether.

In December 2006, the Bioengineering and Prosthetics Services moved to the Southeast Mobility and Rehabilitation Technology (SMART) Centre, a new purpose-built rehabilitation medicine building at Astley Ainslie Hospital, where it has remained ever since.

Gait analysis software used in the SMART Centre in the 2010s

The SMART Services currently provides wheelchairs and special seating services; prosthetics and orthotics services; environmental controls services (the adaptation of light switches, doors and electrical equipment for disabled people; a custom design service (designing unique equipment depending on an individual patient's requirements) and gait analysis services. 

Patients based in Edinburgh can still be assessed for a blue badge independent mobility assessment at the SMART Centre, as well as undertake a Driving Assessment (a service that has operated at Astley Ainslie since 1983) to learn how to drive again after being injured or discuss vehicle modifications to support their disability.

You can find out more about the work of David Gow and bio-engineering in Edinburgh here:

https://lhsa.blogspot.com/2020/02/this-is-getting-out-of-hand.html

https://lhsa.blogspot.com/2025/04/bioengineering-in-edinburgh.html

https://prezi.com/p/foat604uumlm/bioengineering-in-edinburgh/


Tuesday, 3 March 2026

Gaming health

To bring in the new year, we welcomed Jasmine Hide to the team as LHSA Archives Cataloguer. For the next two years, Jasmine will be working through our uncatalogued holdings, creating more detailed descriptions so that users can access even more fascinating sources about health in the Lothians! In this blog, Jasmine introduces a very colourful new collection....

My name is Jasmine Hide and I am the new Archives Cataloguer with Lothian Health Services Archive. As a new member of the LHSA team, one of the first collections I catalogued was a small collection of  material relating to public health, especially sexual health and HIV.

This collection is a wonderful insight into the various initiatives undertaken to encourage conversations about safe sex among a wide range of audiences, especially locally to Edinburgh. It represents a spectrum of ways to initiate discussions about sexual health, from a series of comics produced by the Lifeline project in Manchester to the minutes of a conference on women’s experiences with HIV and AIDS.

One of the most interesting areas of collecting within this material is a series of games designed to educate participants on the facts about HIV and AIDS. These games aimed to challenge prejudice and misinformation about the transmission of HIV and the social stigma attached to a diagnosis....

Opinions

Designed by Riverside Health Education Service and Hammersmith and Fulham Youth Service, ‘Opinions’ is a game where participants select cards with statements, and sort them into categories depending on whether the group agrees or disagrees. A sample of the kind of statements provided can be seen in the pictures below. The game is designed to promote discussion, and an accompanying booklet provides some factual information regarding each statement for a facilitator to discuss with players.

Above and below: Opinions board, card, and instructions (GD1/154/5/1)




Choices

Choices is a board game designed by Lothian Regional Council Community Education Service in much the same vein. 200 copies were distributed to schools, youth clubs, community education centres and residential settings for young people.


Players roll a die and select a card according to the colour of the space they have landed on. The player then tries to answer the question on their card. An accompanying booklet provides detailed answers for a facilitator and some factual responses to the questions, though not all are simple true or false questions. Again, the questions asked in Choices are designed to challenge stereotypes and prejudices by correcting misinformation and encouraging open discussion.

You can read more about the Take Care campaign in a previous blog post here.

 

Above and below: Choices board, instructions, and question cards





Monday, 25 August 2025

Conservation (10): Mixed media collections

The wide diversity of objects found in the HIV/AIDS collections can present many problems for the conservator, as although the varied items may need to be kept together to maintain the original order of the material, they may have different conservation needs.

 

Problems include:

  • Storage Conditions
  • 3D objects within paper collections causing planar distortion
  • Acids released from ring binders integral to the paper collection

 

Storage Conditions

Different materials found in the HIV/AIDS collection have different optimal environmental conditions for their long term preservation. However, often they need to be stored together to maintain the original order of the collection. Also, in some cases, the optimal storage conditions are simply not available.

 

Solution:

 

While some items in the HIVS/AIDS collections such as VHS, audio cassettes and film reels can be moved to a different storage area with a lower temperature. This may not be possible for all items as moving the items risks losing the original order or context of the collection. The British Standard Institute suggests that mixed archival material can be stored at between 13°C to 20°C and 35% – 50% relative humidity (PD5454:2012). Although the conditions may not be ideal for all items, there is an emphasis on keeping temperature low and humidity moderate which will slow the rate of deterioration of all archival materials.

 

3D objects within paper collections

Having different sized objects within a paper collection may result in planar distortion of the paper sheet and potentially cause tearing. In the HIV/AIDS collections, small items such as condoms, balloons and badges are frequently found within paper documents and need to be removed while still retaining their originally meaning within the collection.

 

Solutions:

 

Shallow tray at top of box

If there are multiple items that need to be removed from a series, a shallow tray was created that can be placed at the top of the box which contains the series from which it was taken. The tray has two flaps that can be used to easily lift the objects out of the box and keeps them together if the researcher does not wish to look at them. Each object is wrapped in acid free tissue paper and clearly labelled to show where it originally came from. A sheet of paper with a notice stating that an item has been removed is also inserted into the items initial location, so that the original order can be recreated if needed.


Shallow tray at top of box to store multiple 3D objects.


Keeping items within series

If there are only a couple of items that are causing planar distortion, it is more suitable to keep these items in the original order, but enclose them in a rigid cardboard casing. A double crease folder was created to the depth of the object using a thick card. If necessary the items can be held in place using a polyester strap.


Double crease folder made from thick card to house 3D objects within a series.


Acids released from ring binders integral to the paper collection

Plastics such as condom and pill cases not only form parts of the HIV/AIDS collection, but plastics such as ring binders and poly-pockets are also used to store the collection. As plastics degrade they release acids that can be absorbed into any adjacent materials and result in deterioration. Office ring binders can be especially problematic as they are often formed from PVC (Polyvinylchloride) which releases chloric acid as it degrades. Therefore, paper materials must be removed from this type of plastic storage to avoid acid migrating into the paper.

However, in some cases the plastic storage system is integral to the object. For example, some ring binders form part of a health promotion pack that may have been taken to schools or community groups. This type of object should be kept as it represents a part of the object’s history and without it the original intent of the pack may be lost.

 

Solutions:

 

Integral ring binders

If the ring binder was judged to be integral to the object, it was kept next to the paper materials it contained, so that the original function of the object could be easily recreated if necessary. Firstly the paper materials were removed from the ring binder and placed in a triptych folder. The ring binder was then placed in a custom made triptych folder.

In some cases, when the papers are removed, the ring binder lies at an extreme angle which may result in papers placed above it becoming bunched together at one edge and cause curling. Therefore, a void filler created from mount board was used to even out the level of the ring binder.

 

Also, if the ring binder is smaller than the rest of the papers in the box, it may cause planar deformation of the sheets as the papers placed on top of it will gradually bend around this shape. In this case, the triptych folder was reinforced using two pieces of thick card on the lower and upper cover.  These two folders containing the ring binder and papers were then tied together using cotton tape and placed in an archival box.


An integral ring binder stored with paper materials.


Sample ring binders

Other ring binders that were judged not to be an integral part of the object were removed from the collections. However, samples of each type of housing were retained and kept at the end of the collection. If there were multiple types of the same housing, only one was kept as a reference. When housing was removed from the collection it was noted what type of housing it was and where it came from.  This means that the original look of the material can be recreated if necessary.


Deterioration of modern media

The following audio visual formats can be found in the HIV/AIDS collection:

  • VHS and Audio cassettes
  • Film reels

Media such as this can deteriorate due to chemical and physical factors, and is also at risk of becoming obsolete as technology advances.



VHS and Audio Cassettes

There are 32 VHS cassettes and 26 audio cassettes in the HIV/AIDS collection. These formats are known as magnetic media as the tape used to carry the information is made from a thin layer which is capable of recording a magnetic signal supported by a thicker film backing.




 

Magnetic media can be damaged through viewing in the following ways:

 

Physical Factors

 

  • Mechanical Damage – Playback of the media on poorly maintained viewing equipment can cause stretching or creasing of the tape. Damage to the edge of the tape can be caused by inappropriate winding in the viewing equipment.  The tape will not play if the edge is damaged as the tape’s control track (a signal that tells the viewing equipment to pull the tape through the machine) is located here.
  • Unsuitable Storage – This can result in debris becoming embedded on the tape which can interfere with the magnetic signal
  • Inappropriate handling – Oils and chemicals compounds can be transferred to the tape through careless handling
  • Magnetic Fields - The tape can become demagnetised by contact with strong magnetic forces such as electrical fixtures, loudspeakers, vacuum cleaners, floor buffers. This changes the magnetic signal and it will become unreadable.

 

Chemical Factors

  • Binder degradation -  The binder used to hold the metallic particles on the tape substrate may degrade in the presence of moisture through hydrolysis. In this process, the bonds within the binder break resulting in loss of strength. This can lead to the occurrence of “sticky shed syndrome” resulting in a soft binder with a tacky surface. This residue can collect in the viewing equipment and cause it to stop running.
  • Loss of Lubricant – Lubricant is added to the tape to reduce friction whilst playing. This facilitates the movement of the tape through the viewing equipment and reduces wear. The level of lubricant decreases over time. It can be lost during playing and it can also evaporate whilst in storage. Without this, the tape cannot be viewed.

Film Reels

In the HIV/AIDS collections seven film reels are dating from the late 1980s to early 1990s. At this time, a polyester-based film would have been used.




Film reels can be damaged in ways similar to VHS and audio cassettes:

 

Physical Factors

 

  • Mechanical Damage – Sprocket and edge damage can be caused during playback on poorly maintained equipment
  • Unsuitable Storage – If the film is unprotected, there is a risk that debris and dust can become embedded on film and interfere with the playback of the material. Equally, if the film is stored in it’s original metal can, there is a risk rust could leave iron oxide deposits on the film.
  • Inappropriate handling – Oils and chemicals compounds can be transferred to the tape through careless handling

 

Chemical Factors

  • Polyester based film, such as that found in the HIV/AIDS collection, is not subject to the same deterioration processes found in acetate and nitrate based films. Its natural deterioration process has not yet been identified.


Conservation of Media

The deterioration of magnetic media and film reels cannot be stopped. However, correct storage and handling can slow down the rate of deterioration and reduce the risk of damage due to physical factors.

 

Handling

VHS, audio cassettes and film reels should be handled wearing nitrile gloves. Care should be taken to avoid touching the tape.

 

Environment

A high temperature and relative humidity can decrease the useable lifetime of the media. Ideally, they should be kept in a cool and dry environment.

 

Storage of VHS and Audio cassettes at LHSA

 

  • Before storing, the tapes were wound to the beginning, ensuring that a flat tape pack was achieved. Any tape that is outside the tape pack is at a greater risk of hydrolysis.
  • If the VHS and audio cassettes were in a case that was integral to the object, it has been kept in its original case.
  • If the cassettes were in cases that were not integral, such as a standard cardboard case, they have been removed and placed in a polypropylene case.
  • These are then stored vertically on the short edge, like books. This helps to maintain a good tape pack.


Before: VHS cassette in integral case.

After: VHS cassette, after rehousing in clam shell box.

Before: VHS cassette in standard paper case.

After: VHS cassette, after rehousing in a polypropylene case.


Storage of film reels at LHSA

  • The film reels were placed in a polypropylene case and stored flat on a shelf like a pancake. A maximum of six cases of the same size can be stacked on top of each other.
  • The original metal cans have been stored separately in a acid free box, so that the original look of the object can be recreated if necessary
Before: Film reel, before treatment in unsuitable storage.

After: Film reel, after rehousing in polypropylene case.


Before: VHS and audio cassettes on shelves, before treatment.

After: VHS and audio cassettes on shelves, after rehousing.

Monday, 18 August 2025

Conservation (9): Deterioration of plastics

Plastics are synthetic or semi-synthetic materials that can be processed to form a wide range of objects, from thin films and foams to large, high-strength 3D objects. Plastics are based on polymers, which are large molecules made from many smaller ones joined together. There are roughly 50 different basic types of polymers used in approximately 60,000 plastic formations. The annual production of plastics has risen dramatically in the past years, from 5 million tonnes in the 1950s to almost 100 million tonnes in early 2000. In 1982, the production of plastic surpassed that of steel and, as such, that year has been signalled as the beginning of the ‘Plastic Age’.


Plastics in the HIV/AIDS Collections  

The proliferation of plastics in contemporary life is reflected in this modern collection. The following plastics are frequently found.

  • 3.5” floppy discs and CDs used to store information from a computer
  • Sound and image recordings such as vinyl records, VHS and audio cassette tapes
  • Photographic materials such as colour photographs, negatives and film reels
  • Condoms and condom/pill cases
  • Balloons, bags, badges and watches used in health promotion campaigns
  • Photocopies and faxes use plastics in the form of co-polymers mixed with carbon black, fused to the surface of the paper
  • Plastic enclosures such as ring binders and poly-pockets previously used to store the material

A severely degraded balloon that has become stuck to a business card.


Degradation processes

Plastic degradation can be defined as any physical or chemical change that results in the loss of the function and form of the object. Deterioration of plastics can be caused by physical and chemical factors.

Physical factors

The mechanical use of plastics relates to degradation caused by handling or use of an object. For example, the incorrect handling and repeated bending of a plastic doll may result in stress fractures or breakages.

Migration of additives: Plastics contain additives called plasticisers that increase the flexibility of the object. However, as the object ages, the plasticisers evaporate, causing it to become more brittle. This can be particularly problematic if the plasticisers are absorbed by another material in close contact with the object. The photograph below shows a window sticker that has degraded, releasing plasticisers which have in turn been absorbed by the plastic pocket it was previously stored in, resulting in deformation of the pocket. 

‘no smoking’ window sticker that has released plasticisers as it has degraded. These have been absorbed into the poly pocket and have resulted in deformation.

Chemical factors

The following factors provide the energy and the environment to promote destructive chemical processes which break the bonds within polymers, resulting in loss of strength, increased brittleness and discolouration.

Light: Ultraviolet light is most damaging to plastics and causes discolouration and increased brittleness. This is due to chromophores in the polymer chain absorbing light and catalysing photodegradation.

Heat: A temperature change can change the physical characteristics of plastics. As the object is heated, it will become more flexible and may distort when handled. The point at which this occurs changes depending on the polymer. Heat also increases the rate of chemical reactions in the object. Heating a plastic object also breaks the bonds in the polymer chain. This is known as depolymerisation and results in a loss of strength.

 

Oxygen: Plastics can react directly with oxygen (auto-oxidation) or with ozone (oxidation). Ozone is a highly reactive material derived from the reaction of oxygen with ultraviolet light. These oxidation processes can, again, cause the breaking of bonds within a polymer and result in loss of strength and brittleness.


Effects of plastics in archives

Plastics not only form part of the HIV/AIDS collections, but are also used to house paper materials. For example, polypockets, ringbinders and spiral bindings are all used to collate and store loose paper in the collections. These plastics are not chemically stable and release damaging acids as they degrade over time. Office ringbinders can be especially problematic as they are frequently made from PVC (polyvinylchloride) which emits hydrochloric acid over time. This acid is readily absorbed by paper materials and can cause them to degrade.

Due to this, all paper materials have been removed from these folders, but reference samples have been kept separately so that the original look and function of the collection items can be recreated if necessary.

An example of a ring binder with poly pockets used to store loose paper in the HIV/AIDS collections.

 A zip lock bag used to store a collection of paper materials from the Take Care campaign.


Conservation of Plastics

The deterioration of plastics is ongoing and irreversible; therefore, preventive care is the best option for this type of material. This involves choosing the best possible storage conditions and handling practices to slow down deterioration and reduce the risk of further damage.

Handling

Plastics should be handled using nitrile gloves. Cotton gloves should not be used, as this can leave specks of lint on plastics that have become tacky.

Environmental conditions for plastics

Plastics should be stored in a cool, dark, dust-free area. The temperature should be kept at 20 degrees centigrade and the relative humidity at 30%-50%.

All UV light should be filtered out and light levels should be kept low during display.

Storage

Plastics should be stored on shelves with good ventilation. The object should not be stored in completely sealed boxes, as acidic vapours released from the object will become trapped and result in a concentration of acids. Plastics can be wrapped in acid-free tissue. However, this is problematic as degrading (and tacky) plastics may become stuck to the tissue.

It is best to store similar plastics together as different plastics will emit different gases, which may adversely affect other objects. While this is not always possible, an activated charcoal cloth can be used to absorb any vapours released from the plastics and prevent them from harming other materials close to the object.

Plastic objects should be regularly inspected for signs of deterioration, such as crazing, discolouration or tackiness. If degradation is suspected, the object should be isolated from other objects.


Plastic objects in the HIV/AIDS collection

The plastics in this collection are in relatively good condition. However, the storage materials used were not of sufficiently high specification. To improve this, the following actions were carried out:

  • Holes were cut into the side of the box to increase ventilation
  • An activated charcoal cloth was used to line the bottom of the box and absorb any acidic vapours
  • Card walls were used to separate different objects to aid in locating the objects and reduce handling
  • Items were placed in inert polyester pockets with one edge left open to protect the object, but allow ventilation
Photographs of plastic objects before and after treatment.