Re: POP prints archival ?
SCHRAMMR@WLSVAX.WVNET.EDU
Wed, 01 May 1996 09:51:54 -0400 (EDT)
No reason why it should be any better or worse than any silver print.
POP paper contains silver chloride. Modern papers are a mixture of
silver chloride and bromide. But the significant condition is gold
toning and washing. Once the paper is exposed, developed and fixed the
image is made of silver grains. It maters not if it started out as
silver chloride or silver bromide or for that matter, silver iodide.
The gold attaches itself to the silver grains. Gold is less reactive
than silver. A really good washing gets rid of the hypo.
BTW most photoarchivists consider selenium toning as good as gold toning.
Properly fixed, toned and washed silver prints shoul;d have a lifetime
of 100-300 years. Some RC papers are now being accepted as archival
e.g. Ilford Multigrade IV Deluxe.
Bob Schramm