Platinum Toning of Kallitypes

Bruce

Member
Joined
Oct 25, 2006
Messages
202
Location
Centerville
Format
35mm
I have read that in Platinum toning of Kallitypes you use sodium citrate or citric acid. Are these the same chemicals?

Christopher James book says Sodium Citrate where Sandy King says to use Citric Acid.

Thus which should I use?
 

Jim Noel

Member
Joined
Mar 6, 2005
Messages
2,261
Format
Large Format
They are not the same chemicals. Sodium citrate is a salt and citric acid is an organic acid. They both will work in this case. My preference is citric acid primarily because Pt and the other iron based processes are primarily acidic processes and I keep more of it on hand.
 
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