Originally Posted by
LabRat
There's a phenidone and metol version... Phenidone uses 1/10 gm, but metol uses 1 gram per liter... Phenidone is considered a safer developing agent and stock stores well... The downside is it is harder to agitate to get an even development with it, but possible following exact instructions (look up Tech Pan + developer tech sheets)... The metol formula is easier to get more even results...
You only need about a 10th a gram of Phenidone to match a gram of metol for replacement in most all formulas, but a longer developing time with a little less contrast... And a little goes a very long way, so not expensive... And often used for paper developers if you mix...But there are specific mixing instructions to dissolve it in solutions...
Steve K
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