Ilford IF-13 Potassium Alum Acid Hardener-Fixer

[Christopher Walrath]

Christopher Walrath submitted a new resource:

(there was a url link here which no longer exists) - Ilford IF-13 Potassium Alum Acid Hardener-Fixer

Ilford IF-13 Potassium Alum Acid Hardener-Fixer

This fixer is intended for use with photographic papers.

STOCK HARDENING SOLUTION
Sodium Sulphite, anhyd . . . 50g
Acetic Acid, glacial . . . 75ml
Potassium Alum, cryst . . . 100g
Add water to make . . . 1 litre

Dissolve the sulphite in 200cc of water warmed to 52C or 125F thoroughly and allow it to cool. Then add the acid very slowly with constant stirring.

Dissolve the alum in 600cc of water warmed to 52C or...

(there was a url link here which no longer exists)

 

[Christopher Walrath]

As always, please exercise extreme caution when handling caustic chemicals such as acids. Wear those aprons, gloves and goggles my pretties. Wouldn't want something untowards to happen to you.