... and a guy in Maryland who's name I can't remember right off who's actually doing testing correctly -- getting fade and delta-e both for all the inks and inks in combination, and older photographic print processes too like RA-4 (at least I seem to recall that he's going to be testing RA-4 and some other processes to get comparisons). A lot of people in the industry think he's got his act together. If I can find his URL I'll append it when I find it -- he's the most interesting of the lot IMHO.
i have several color prints, which i printed myself from a negative in 1984. They have been sitting in a box (archival) since that time. Once in awhile i bring them out to show some students the difference between them and some color prints made on Cibachrome in 1983 (in the same box) The prints made from the negatives are fading , the cibachromes look basically the same.
just my personal experience.
That is basically my experience also. All of the C and R color prints that I made in the 1980s with Kodak papers have faded, even when stored in the dark. On display they all faded within a few years. Cibachrome prints that I made in the same period appear to be in very good shape. Tri-color carbon prints I made during this period are also in very good shape.
Sandy King
Prints from that era fading blue is quite unusual IIRC. They usually faded red when they went.
PE
What marking is on the back? I can check on it.
Im curious as I know that there were non-Kodak papers that faded blue, but you said "Kodak". Kodak had just patented a new method of stabilzing a new type of yellow dye, so they were quite good at that time.
PE
If all you knew of archival properties came from this discussion, you'd think that the only paintings in museums were B&W from this talk. I'm not claiming that this color artwork doesn't face issues over its lifetime, but its certainly possible to create color pigment artwork that will last for hundreds or even thousands of years.
Here's an informative essay from Joseph Holmes' site I read recently:
http://www.josephholmes.com/processes.html
scroll down to permanence.
Just looking at a list of the relative permanence of artists watercolors, the most permanent seem to be those using simple mineral- and metal-compound-based pigments, while the least permanent are those with natural or sythetic organic pigments, particular the more delicate colors.
All modern photo processes use complex organic dyes, and the choice of dyes to use is particularly restricted to those which are of the exact colors needed, which can be formed during processing and the components of which are sufficiently stable, economical, not-too-poisonous, etc, etc., to be incorporated into emulsions and processing chemicals.
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