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Photographer's Formulary Pyrocat-MC Film Developer is a high acutance developer, formulated by Sandy King as an alternative to other pyrogallol based staining developers.
The advantages over PMK that Mr. King cites for his formula include an approximately 1/3 stop greater effective film speed, 10-15$ shorter development times, more consistent staining action, lower toxicity, and no streaking or mottling with reduced agitation
In the Box
Photographers' Formulary Pyrocat-MC in Glycol Film Developer - Makes 50 Liters (13.2 gal)