cudbear

/kuhd-bair/US // ˈkʌdˌbɛər //UK // (ˈkʌdˌbɛə) //

灰熊,泥菩萨过江自身难保,泥菩萨心肠

Definitions

n.名词 noun

1
- : a violet coloring matter obtained from various lichens, especially Lecanora tartarea.

A mordant of alum, followed by a hot bath of brazil wood, and afterwards by a weak one of cudbear.
The above deep red feathers are passed through a bath of cudbear.
Instead of logwood a little madder is sometimes used; also Cudbear or Barwood.
The manufacture of Archil and Cudbear from the various lichens is simple in principle.
The lichens thus treated acquire gradually a deep purple colour, and form the products called "cudbear."