Re: Correction Re: Albumen toning questions

[Sandy King <sanking@clemson.edu>]

Judy Seigel wrote:


>On second thought, I think the toning before fixing may not apply to
>albumen printing -- maybe only POP.... Though on 3rd thought, as I recall
>kallitype can be toned either before or after...
>
>Thanks in advance for fact and/or opinion.
>
>J.


I tone both kallitype and vandyke before fixing. With the formula 
that I use (In one liter, 5g of citric acid plus either 5ml of 
Potassium chloroplatinite #3 or 25ml of 1% gold chloride)  there is a 
much more dramatic change in color when toning is done before fixing. 
I tend to believe this indicates that the toning action, in which the 
silver metal is coated with gold and/or platinum, is more complete 
when the toning is done before fixing. I did some limited work with 
home-made POP last year and my observations were the same, i.e. 
toning before fixing gives a much greater change in color than toning 
after fixing. However, POP appears to require quite a bit more 
solution to get a color change, perhaps because of the gelatin 
emulsion.

Sandy King
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