noun, noun or participle which takes 'suru'
brightening; whitening
Technical term in chemistry and related fields for making something whiter or brighter, often used for bleaching or optical brightening of materials.
この洗剤には増白剤が含まれている。
This detergent contains a brightening agent.
紙の増白処理には蛍光染料が使われる。
Fluorescent dyes are used in the brightening treatment of paper.