A short introduction to the problems related to the conservation
of photographic material. How long photographs will keep depends
on, among other things, the stability of the support, the
control upon and the completeness of the finishing processes,
and the storage conditions. The author, one of the very few
Dutch experts, gives some information on various supports such
as glass, polyester, paper etc. and gives a list of causes of
deterioration. A bibliography is included. (Dutch)