Patent Pick: Dry Shampoo Recipe Calls for Corn, Potatoes and a Dash of Zinc Salt

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Dry shampoos have existed for years, either in powder or aerosol form. They remove excess sebum quickly from hair without the need to wet it. According to a new L'Oréal patent application, such products work by absorbing sebum through powders chosen for their sebum-absorbing qualities.

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