Roger Hein (rogein@interlog.com)
Wed, 28 Jul 1999 15:34:52 -0400
Just a thought and a question on 'terminology' - is the observed
'effect' solariztion or severe 'bronzing'? (Hard for me to tell -
sometimes they appear quite similar)
Anyways, a possible explanation would be too much light hitting too
little emulsion? I find that Arches Platine needs, in my situation,
more emulsion than Crane's Platinotype. For a 4x5 neg I find using
about 16 drops of total solution works well with the Arches; 12 drops
total for the Crane's.
Hope this helps,
Roger...
Gary Miller wrote:
>
> 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
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