TF-3

Alkaline fix for use with PMK and other processes

Ammonium thiosulfate (58-60%)800ml
Sodium Sulfite (anhydrous)60g
Sodium Metaborate5g
Distilled water to make1000ml
Mixing Instructions: Add chemicals in specified sequence.
Dilution: 1+4
Usage: Fix for 3x clearing time.

Notes 

This formula is faster than older hypo-based fixers but takes longer than an acid-based fixer.