[alt-photo] gum contrast...

[Paul Viapiano]

Hi all,

Thanks for the comments on my last question. Sodium bisulfite helped restore 
brighter colors but yes, not overexposing in the first place is good advice.

Riddle me this, sil vous plait: Knowing that decresing dichromate increases 
contrast, what would be the difference between a mixture of 2:1 
gum/dichromate and a mixture of 1:1 where the dichromate is 1/2 strength, 
both at the same exposure time?

Katherine mentions in her website that halving dichromate reduces speed by 
approx one stop. If you halved the dichromate, and increased the exposure by 
two, would you effectively get the same print as a 1:1? I'm trying to see 
relationships in theory here...

Thanks in advance...Paul