|
Caring for Plastics & Other Polymers
Most, if not all, degradation processes
in polymers are ongoing and irreversible so preventive care is very
important. This should start before an object is acquired.
- Is it in sound condition?
- Is it showing tell-tale signs of
deterioration?
- Does it appear to have been exposed to a
harmful environment in the past?
Finding an object in perfect condition
may be impossible (or, perhaps prohibitively expensive), but it is better
to acquire one that is physically damaged (e.g. with a crack or chip)
rather than one that is chemically deteriorating.
Many people can spot deterioration in
rubbers and it is just as easy to learn the tell-tale signs of degradation
in other plastics. It is particularly important to be able to recognise
when cellulose nitrate or cellulose acetate is degrading.
Do's and Don'ts
- Do keep polymers in the dark whenever
possible.
- Do ensure storage and display area is cool,
dry, dust-free and with some ventilation.
- Do inspect regularly for signs of
deterioration (not less than yearly).
Remember if you suspect an object is degrading it is best to isolate
it from others and remove it from the collection until you are sure it
is OK.
- Do support soft or flexible objects in their
normal shape.
- Do handle objects carefully and wear clean
cotton gloves if possible.
- Do wrap objects in uncoloured tissue paper
(preferably acid-free tissue) rather than newspaper.
- Don't expose objects to strong light.
- Don't keep polymers in damp or stuffy
places.
- Don't store objects in completely sealed
boxes, plastics bags or other wrapping which would restrict
ventilation.
- Don't clean plastics with solvents or other
household cleaners unless their long-term effect on polymers is known.
- Don't allow objects to contact each other.
Specific advice on some polymers will be
provided at a later date. If you need advice in the meantime please contact
the Plastics Historical Society.
|