Very roughly, the principle is oxidation - bleaches are oxidizing agents that react with the colored molecules. Organic dyes get their colors from a series of alternating double bonds and once these are disrupted, the color goes away.
Very roughly, the principle is oxidation - bleaches are oxidizing agents that react with the colored molecules. Organic dyes get their colors from a series of alternating double bonds and once these are disrupted, the color goes away.