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Food

How do they bleach flour?

2 Answers

Flour bleaching agents are added directly to the freshly-milled flour. Powder bleaching agents such as benzoyl peroxide are mixed directly with the flour. Whitening is often completed in two days.

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The flour bleaching process commonly employs benzoyl peroxide and chlorine gas, among others to speed up the aging process. A much longer bleaching process would be to expose the flour to ultraviolet light, such as sunlight.

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