> Varying the proportion of pt to pd acts as a more than adequate contrast control
> without graininess and muddiness.
Terry,
my experience with the p/p metals is that platinum is much contrastier
than palladium. But I have found that using more that 50% platinum
in the emulsion increases the streaking problems. Straight platinum
is much grainier than palladium.
How are you mixing your chemistries and what rules of thumb do you use
to control contrast with the metals?
Gary Auerbach
http://www.ibs-net.com/platinum.htm platinum photography
http://www.flash.net/~internut pistachio farm