>
>
>I appreciate that the yellowing point was a question. It was a
>question we had to ask ourselves as, at one stage, we thought of
>abandoning albumen as a size because of the yellowing. I fully
>accept that many early albumen prints appear yellow due to
>inadequate processing. My suspician is that the yellowing has a lot
>to with residual sodium thiosulphate in silver albumen prints
Yellowing of albumen prints is not due to the albumen itself but to
silver that remains in the print in combination with the albumen,
silver albumenate. This can not be removed by hypo, and the yellowing
of the highlights occurs as the albumenate breaks down and releases
the silver, which then reacts with sulphur compounds in albumen to
produce brown silver sulphide. The yellow fading can not be reversed.
I would not expect that a Pt./Pd. print on paper sized with albumen
would yellow. I have made a few carbon prints using paper sized with
albumen rather than gelatin but there is not enough difference in
look, at least in my eyes, to justify the additional expense and
trouble. If you choose to try albumen sizing for Pt./Pd. printing you
might look into the liquid albumen sold in grocery stores.
Sandy King (Not to be confused with the other King!)
Received on 07/21/06-11:08:08 AM Z
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