I also find the h202 method unpredictable. It has a limited effect,
that does not seem proportional to the amount used. I do not use it
currently. I do use the ferric oxalate with chlorate added, the B/S
chemistries.
I have found that the Cranes platinotype paper shows very little grain
when printed on the smooth side with almost any contrast level added.
The rough side of the paper is much more sensitive to contrast levels
and grain.
Cranes ecru paper meanwhile, is one of my favorite papers for 8x10
portraits and it is VERY grainy. I love it. It looks and feels old,
with remarkable grain, perfect sharpness and a very warm tone. You have
to be careful with the watermark. This is one of those stationary type
papers that Judy has mentioned, I think it is wonderful.
The grain that is seen in the ecru paper is very different than grain
visible in an enlarged silver image.
Gary Auerbach
http://www.ibs-net.com/platinum.htm platinum photography
http://www.flash-net/~internut pistachio ranch