TF-2 is for users who are determined to use sodium thiosulfate rather than ammonium thiosulfate and who would like a formula superior to the traditional acid hypo fixers. TF-2 will wash out of negative and print materials more rapidly than will an acid fixer.
STOCK SOLUTION
| Chemical | Amount | Units |
|---|---|---|
| Distilled water | 1000 | ml |
| Sodium Thiosulfate | 250 | g |
| Sodium Sulfite (anhy) | 15 | g |
| Sodium Metaborate | 10 | g |
| Distilled water to make | 1000 | ml |
USAGE
Fix the film for three times the clearing time, usually 3 to 5 minutes.
Follow with a two minute wash in running water for film. A hypo clearing agent
is not required. Prints should be rinsed for at least 30 minutes in running
water.
NOTE
To obtain maximum image stain with PMK, reduce the
sulfite in TF-2 or eliminate it altogether. If you do this, the life of the
working solution cannot be guaranteed beyond one day, but you will achieve the
maximum imagewise staining of which PMK is capable.
REFERENCE
TF-2 Alkaline Sodium Thiosulfate Fixer,
The Film Developing Cookbook,
Stephen G. Anchell and
Bill Troop, p. 120
The Darkroom Cookbook,
Second Edition, Stephen G. Anchell, p.215.