TF-3

Alkaline fix for use with PMK and other processes

Ammonium thiosulfate (58-60%) 800ml
Sodium Sulfite (anhydrous) 60 g
Sodium Metaborate 5 g
Distilled water to make 1L
Mixing instructions: Add chemicals in specified sequence.

Dilution: 1+4

Notes: Fix for 3x clearing time. This formula is faster than older hypo-based fixers, but takes longer than an acid-based fixer.