Re: Pt./Pd. question acid pre-soak

I accidentally pre-treated Fabriano Extra White in citric instead of
oxalic acid right before a workshop about a year ago. Everything
seemed to print the same. I did not do any rigorous comparison
between the prints treated with oxalic and the prints treated with
citric, but the difference was certainly unnoticeable to the casual
observer, and probably to a print sniffer as well.

YMMV

clay

On Aug 8, 2005, at 7:37 PM, Sandy King wrote:

> As we know a pre-soak in a 1-2% solution of oxalic acid can add
> quite a bit of Dmax in Pt./Pd. printing with some papers. Does
> anyone know the mechanism of how this works? Is it merely a
> question of acidifying the paper? Has anyone ever compared the
> results between papers pre-soaked in oxalic acid and in some other
> dilute acid solution, say a 1-2% solution of citric acid?
>
>
>
>
> Sandy
>
Received on Tue Aug 9 04:40:22 2005