Usage Variations of D-23 Jun 29, 2013 1:23:36 GMT Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Steaphany on Jun 29, 2013 1:23:36 GMT From the Chemical Formulae for use in the Darkroom, Photographer's Formulary's D-23 Technical Information, and "The DARKROOM COOKBOOK" Third Edition by Steve Anchell: