تركيب محاليل التبييض .. كتاب التصوير للهواة

The fourth lobe is the composition of bleaching solutions
PH acid whitening bath. 5,2
PH.5.2 acidic whitening bath and increase hardness
Alkaline bleaching bath PH 7,8
salts
Potassium bromide
Sodium phosphat
Sodium sulfat
Sodium acetate boric acid powder
potassium alum and water to make up the volume of the solutio
However, there are other fixation and bleaching solutions together that are used in the processes of showing colored positive images and depend on the use of salts organic iro
After the treatment in the attempt to whiten and fix, the film should be washed well, and if a solution was not used to increase the hardness, then it is more appropriate to use a solution consisting of 2% formalin and a 3% solution of sodium carbonate (powder) for this purpose.

The film is treated in this solution for five minutes, followed by a short wash.