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

[Terry King]

Loris


So far as I have been led to understand the changes in the silver causes a change in  refraction which leads to a change in the perception of tone.


Terry





-----Original Message-----
From: Loris Medici <mail at loris.medici.name>
To: The alternative photographic processes mailing list <alt-photo-process-list at lists.altphotolist.org>
Sent: Fri, 16 Jul 2010 18:58
Subject: [alt-photo] Re: post fixer toning of VDB


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. 
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