Acid Hardening Fixer

Fixing bath with hardener

Part A
Water 125F/52C500ml
Sodium Thiosulfate (Hypo)240g
Part B
Water 125F/52C150ml
Sodium Sulfite (anhydrous)15g
Acetic Acid 28%45ml
Potassium Alum15
Mixing Instructions: Add chemicals in specified sequence. Mix solutions separately, stirring rapidly while adding Solution B to Solution A.
Dilution: Use undiluted.
Usage: Fixing time is 5-10 mins at 20C.


This is the DuPont 2-F formula.
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