noun
hair-washing powder; powder shampoo
A traditional powder used for cleaning hair, often made from natural ingredients like rice bran or clay. Now somewhat old-fashioned, replaced by modern liquid shampoos.
昔は髪洗い粉を使って髪を洗っていた。
In the past, people used hair-washing powder to wash their hair.
この髪洗い粉は米
This hair-washing powder is made from rice bran.