Re: Lithium palladium vs. normal palladium
Loris, are you rod coating or brush coating—that could be part of the difference. Mark In a message dated 1/18/07 2:21:23 PM, mail@loris.medici.name writes: But Witho is double coating with half-strength solutions (or using two times water - if you like). So the final amnt. of iron sensitizer and Pd double salt remans the same (therefore should act the same). I had to increase exposure times back when I was double coating Classic Cyanotype to get better Dmax - but the solution wasn't half strength, it was full strength. Probably it was due to the extra filtering effect caused by more concentrated coating solution... BTW, 2ml for 12x20 sized print on COT320 is very little by my standards. I'd use about 2x solution for that size. I use 0.2ml to 0.15ml per 10 square inches depending on the RH and coating method (glass rod / brush). See below: 12 x 20 = 240 / 10 = 24 * 0.2 = 4.8ml, 12 x 20 = 240 / 10 = 24 * 0.15 = 3.6ml. See? Even at 0.15ml per 10 square inches, I use about 80% more than Witho!? Regards, Loris. Best Wishes, Mark Nelson Precision Digital Negatives - The System PDNPrint Forum at Yahoo Groups www.MarkINelsonPhoto.com
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