Solarizations with Platine and Pt


Gary Miller (gmphotos@earthlink.net)
Tue, 27 Jul 1999 20:38:41 -0700


Today I bought some Arches Platine and did a few Pt/Pd tests. I used 11
drops to cover a 4x5 area. The mixture used was 5 drops of solution 1, 1
drop of solution 2, 3 of Pd, 2 of Pt, and sometimes 1 drop of Tween 20
(10%). All four samples that I did were exposed for different times ranging
from 11 mins to 16 mins, and all showed reversal/solarization in the darkest
areas. I even see this solarization in most of the numbers on my step wedge
and the beginning, top, part of the wedge up to about step four is totally
obliterated/solarized. Is my exposure too long. The 11 min one looks fine
otherwise with detail throughout,even in the brightest highlights. The same
formulation used on Cranes Platinotype had an exposure time of 16 mins.
Both were developed in potassium oxalate at 85F, and cleared the same. Any
advice would be greatly appreciated before I do some more tests with shorter
exposures. Could there really be such an exposure time difference between
these two papers?

Gary Miller



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