Processing old verichrome....

[analog what is that?]

I did a Verichrome red backing paper, with 50 yrs+ images on it with excellent results a few months, in Caffenol CM. (Caffenol CH with 1 gram KBr per litre).

Caffenol is especially forgiving in circumstances like this, most B&W films uses the same baseline time 12 minutes @ 20C, C-41 color a little more, roughly 16 minutes @ 20 C.

So if anyone comes across very old film and has no data (old Gevaert for instance did one like that with excellent results), Caffenol is a good place to start. But one definitely needs to find potassium bromide (KBr) to get rid of chemical fog, nothing else cuts through that.

[flyski99]

Interesting.... I have the KBr, (I do wet plate). I don't know of caffenol CM. Is there a formula or MfG? Thanks!

[analog what is that?]

http://ascorbate-developers.blogspot...3/recipes.html

[flyski99]

Thanks!

[flyski99]

I did 5 snip test on the roll, settled on hc110 B 66* 12 mins and images where not to bad, fogged but scan-able. Caffnol smells good but would take 2x normal development.
Pre soaking maybe a good option, but I did not. Thanks for you input !

[nworth]

The wooden spool suggests World War II era film, which would be the old, orthochromatic Verichrome. I have an old PLI with pages from about 1947 to maybe 1952, and it suggests D-76 for 11 minutes (with agitation every 2 minutes) or D-23 for 13 minutes (with agitation every minute) for that film.