noun, noun or participle which takes 'suru'
preliminary dyeing; bottoming
Technical term in dyeing: the first dyeing step that establishes a base color before overdyeing. Often contrasted with 上掛け (うわがけ).
See also: 上掛け (うわがけ)
藍染めでは、まず下染めをしてから本染めに入る。
In indigo dyeing, you first do a preliminary dyeing and then proceed to the main dyeing.
この布は下染めに茜を使っている。
This cloth uses madder for the bottoming.