Adding some contrast to p/p is not in itself problematic. P/P has
tremendous contrast control, between the two actions of the metals,
whether you use pot ox, chlorates, or h202. When you are in the 8/4,
9/3/ 10/2, 11/1, range, that extra boost may well make the difference
between a good print and a flat print. We all know how bad a flat P/P
can look. Some of my best images and prints, came out of 9/3 negatives.
When you get a negative that has the range to print with no contrast,
making a print is a snap. Thats why all the effort to get the perfect
negative in the first place. Ease of printing and longest tonal range. A
9/3 negative might just take a little longer to nail, unless you read it
correctly to begin with, but you can still get a GREAT print.
Gary Auerbach
http://www.ibs-net.com/platinum platinum photography
http://www.flash.net/~internut pistachio farm