What brand of hair dye do you use?

你用什么牌子的染发剂？

Have you got a good brand hair dye?

你有好一点品牌的染膏吗？

It's found mostly in nail polish and hair dye.

大多存在于指甲油和染发剂中。

The gallic acid hair dye is used for black-dyeing of human hair.

该没食子酸染发剂用于人发的染黑。

Poor quality hair dye will cause an allergic reaction to the skin.

质量不好的染发剂会引起局部皮肤过敏。