Richard Sullivan (richsul@earthlink.net)
Tue, 01 Jun 1999 10:14:19 -0600
ON second thought there is a caveat on this. Since the Ziatype is a damp
process, any residual H2O2 in the paper could cause an increase in
contrast. In the Anderson DO method the paper is dried and any H2O2 would
be evaporated out.
--Dick Sullivan
At 09:56 AM 6/1/99 -0600, you wrote:
>At 05:53 PM 5/30/99 +0200, you wrote:
>>I am not sure whether my ammonium ferric oxalate is still okay. Is it
>>possible to repair it, in the same way as ferric oxalate, with hydrogen
>>peroxide? If yes, how much should be added to a given quantity?
>>Lukas
>
>
>If the color is still bright, primary and transparent it is still good.
>The peroxide will work too.
>
>--Dick Sullivan
>
>
>
>
>
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