Can anyone tell me what is the shelf life of W665 developer. And whether it is reusable?
Edwal 32 non-staining superfine grain developer:
Water...............................................900ml
Metol.................................................12g
Fine grain sulphite........................90g
Ortho-phenylenediamine...........12g
Sodium bisulphite..........................10g
Water to make...................................1L
Good for subjects having strong contrast.
Increase time by about 6% for each subsequent film.
'fine grain sulphite' means sodium sulphite?
Increasing time is not so practical for film calibration ... do you know how a way to replenish Edwal-32?
It may be of interest to try it with ascorbate, as in Jay DeFehr's Halcyon which uses PPD:
Halcyon p-phenylenediamine developer test
Opinion is divided over PPD, some say it has unique properties, others that it was replaced by Microdol (now discontinued) and by Perceptol (still available) as an ultrafine grain developer.(See the Film Developing Cookbook by Anchell and Troop for more details) PPD can cause permanent allergy...www.photrio.com
There are 3 others listed in "Developing" 1948 p151 by CI Jacobson.
You realise that these were abandoned after the discoveries of [Henn?] of more dermatologically safe alternatives?
But I have read that OPD is safer than PPD and used as an ingredient for hair dyes in some countries?
You realise that these were abandoned after the discoveries of [Henn?] of more dermatologically safe alternatives?
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