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TF-3 Alkaline Fixer

Ammonium Thiosulpate (58-60%) 800ml  
Sodium Sulphite (anh) 60 g  
Sodium Metaborate (anh) 5 g  
Water to 1 litre (Distilled)

Alkaline fix for use with PMK and other processes

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.