[pure-silver] DS-10/HP5 curves and questions
- From: Craig Schroeder <craig@xxxxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sun, 12 Jun 2005 11:10:41 -0500
I used Ryuji's DS-10 with good initial success last year and kind of got
away from it when I began experiments with some concentrate projects. I
wasfalling back on the DS-10 when doing things I didn't dare leave to my
experimental things. Just recently, I ran some DS-10/HP5+ tests for
plottingcurves (which I hadn't bothered with previously). Both rolls
(separate development) exhibited a slight flat spot around Zone 7-8 and I
hada slightly longer toe than ideal. By replotting my EI speeds, it
appears that I would need to rate it at 160 and back off just slightly on
development. I used 11 minutes at 1:0, 68ºF with 2 inversions/minute.
Does this square with what others are getting? I was surprised at these
results because my negatives at 320 printed quite well with only a slight
wish for more shadow detail. I tend to caution on the over-exposure side of
decisions so I was likely exposing slightly slower than the 320, though.
I'll mix up a new batch and rerun my tests as I noticed a very, very slight
dusting of chemical that hadn't gone into solution and I hadn't seen this
behavior before. I mix my DS-10 in distilled water.
Has anyone tried any BZT or KBr with DS-10? On the 35mm film I was testing
with, I measured more fogging than I would like. I know I could answer all
of this by just trying it but I'd like to save repeating others' trials if I
can.
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