Re: Black spots in Pt./Pd.

I just tried another paper and did not have the black spots.

So what causes this, and is there any way to avoid it. I have a
hundred sheets of this Lenox that I planned to use for palladium
printing and hate to think that it will be no good. The last batch of
Lexon I had printed beautifully.

Sandy

>Most likely a paper issue... Have you tried other papers recently
>with your current batch of FeOx and Pd?
>
>Kerik
>
>>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 10:45:16 2005