[alt-photo] Re: post fixer toning of VDB

[Loris Medici]

OMG, you're completely right about the Ag(0) issue! Silly me... :)

OTOH, I really don't undestand what's going on with Vandykes; you 
expose, you get a print out image (which is considerably weaker than its 
fully processed / final state), and you tone/fix or fix, and the image 
considerably darkens. What's happening in between? Perhaps the paper has 
both a silver image and a latent image before fixing, is it indeed so?

Regards,
Loris.

P.S. If the pigment was lapis lazuli instead of phtalo, the post 
wouldn't be so cyan... ;)

16.07.2010 20:38, Alberto Novo yazmış:
> Loris,
>> Francis, a wild a.. guess: bleach the print using a rehalogenating 
>> bleach (e.g. 10% potassium dichromate + 10% sulfuric acid, 1+1), then 
>> try to tone (and fix, and wash) and see what happens???
>> OTOH, to my knowing, the gold toner will work after fixing too, 
>> you'll just need to refix and wash. Probably the results will be 
>> different that toning before fixing...
>
> you are right: the gold toner works also after fixing. It is usually 
> made before in order to shorten the whole processing time, long rinses 
> included.
> But if you bleach the print you will not have any Ag(0) to tone anymore.