Mix the powdery mineral color such as pulverized azurite, byakugun (a light blue pigment) or malchite (white No.1 to byakuroku (a pale green pigment)) on a pallet with a small amount of glue solution and mash it well with the middle finger until it reaches the required viscosity.
岩絵具で群青の薄群、白群、緑青の白一番から白緑までの粉状のものは、皿の絵具に膠水をまぜて、中指で十分磨り、何回か水を少量加えて適当な粘稠度にして使う。