Faded spine
One of the Library’s main functions is to protect our collections in order to extend the lifespan and usability of volumes and other objects. To do this we must ensure a clean and stable environment. We must also safeguard our collections from high light levels – light fades and weakens materials such as leather, cloth and paper. Even indirect sunlight causes damage, but direct sunlight measures 10,000 lux – 200 times the recommended level – and should therefore never be allowed to enter our storage areas.
Part of my work in the Preventive Conservation Unit is to advise and to raise people’s awareness of such issues. As part of this campaign I’ve placed several pages that offer preventive guidelines on the Library’s website – see Collection Care, Light Damage and Self-help etc.
The photographs show the destructive effects of light, and the advice for you at home is to keep your blinds closed as often as possible. This action will prolong the life of your volumes, framed photographs and works of art etc. If the pictured volumes had been sheltered from light damage they would probably be as good as new today.
Library's copy on the right!
In my opinion, the coating of UV filters on windows is ineffective against the effects of heat and visible light from direct sunlight. I was therefore very glad to see new blinds being placed on western facing windows of Book Stack One in the past few days.
Iwan Bryn James
Preventive Conservation Unit Manager