The Universal Selection Source: Cosmetics Ingredients

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Gentle Dyeing and Lightening Agents Having Improved Lightening Power

SpecialChem / Sep 19, 2012

Oxidative dyeing and lightening processes on keratinic fibers usually proceed under alkaline pH, especially from 9.0 to 10.5. Such pH values are required in order to ensure that the external squamosal layer (cuticula) opens, thereby enabling the active species (dye precursors and/or hydrogen peroxide) to penetrate into the hair. The alkalizing agent used is typically ammonia; ammonia, however, is

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