Ilford IF-15 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-15 Potassium Alum Acid Hardener-Fixer

Ilford IF-15 Potassium Alum Acid Hardener-Fixer

This hardening fixer is intended for use with films and plates.

Sodium thiosulphate (hypo), cryst . . . 320g
Sodium Silphite, anhyd . . . 30g
Boric Acid, cryst . . . 10g
Acetic Acid, glacial . . . 18cc
Potassium Alum, cryst . . . 25g
Water to make . . . 1 litre

Dissolve the hypo in 500cc of hot (52C or 125F) water. Upon cooling, add the sulphite.

Dissolve the boric acid, acetic acid and alum in 150cc of hot (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.