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Review Summary
2019-11-27T07:23:14
It’s a chemical widely available. Adorama had the best price once shipping was included.
Raphael W.
Metabisulfite of potash
Potassium pyrosulfite
pyrosulfurous acid, dipotassium salt
Disulfurous acid, dipotassium salt
Potassium disulfite
Transparent needle crystals or crystalline powder
Odor of sulfur dioxide
As a preservative in developers
Used in place of sodium sulfite in some developers
Used for acidifying fixing baths
K2S2O5
10g (0.35oz)
Good Source for Alt Process Chemicals
By Raphael W.
It’s a chemical widely available. Adorama had the best price once shipping was included.
Potassium Metabisulfite Uses
As a preservative in developers
Used in place of sodium sulfite in some developers
Used for acidifying fixing baths
Note
Replaces sodium bisulfite weight for weight. Deteriorates rapidly in air.