Black spots in Pt./Pd.

Another Pt./Pd.question.

I have not done any Pt./Pd.printing in about 6-8 months and when I
began trying to calibrate my materials again I ran into a problem
that I have not seen before, small black spots on the print that
appear during development.

The chemistry that I am using 1 part of 25% ferric oxalate plus 1
part of 20% palladium chloride. The solutions are clear and are
giving very good Dmax, even though they were mixed several months ago.

The paper is Lenox, which I have not previously used for Pt./Pd. printing

Does this sound like a paper issue, chemistry issue, or some type of
contamination I am not understanding.

Sandy
Received on Tue Aug 9 09:57:17 2005