Reducing bleach

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Description

A compound that reductively reacts with a colored substance rendering it colorless and/or soluble. Reducing bleaches are considered less destructive to fibers than oxidative bleaches. However, compounds bleached reductively can oxidize in air thus reverting to their prebleach color.

Examples of reducing bleaches include:

Sodium borohydride, Tetramethylammonium borohydride, tetraethylammonium borohydride, Sodium dithionite (sodium hydrosulfite); Sodium bisulfite, Sodium thiosulfate (Blankit), Sodium formaldehydesulfoxylate (Rongalite), Titanium trichloride, Titanium sulfate

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