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PHOTOCHEM Sodium Sulphate anhydrous 500gm (05535-0500PP)
Sodium Sulphate (chemical formula: Na₂SO₄) is a white, crystalline salt that is highly soluble in water. It is commonly used in detergents, paper manufacturing, and as a drying agent in laboratories. In photography, sodium sulphate is often used as a stabilizer in developer and fixer solutions, particularly in black-and-white processing. Its main role is to reduce swelling of gelatin in photographic films and papers, helping to maintain the emulsion's physical integrity during development and washing. It can also help control the rate of chemical reactions, improving image sharpness and consistency. By minimizing gelatin softening and preventing streaking or uneven development, sodium sulphate contributes to producing clean, stable photographic results—especially in extended processing or archival workflows.
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