| If the red color of the wool is due to archil or cudbear, it is extracted by hydrochloric acid, which is colored red. |
| Dye with equal quantities of cudbear and Logwood, the wool having been mordanted with chrome. |
| If the colour is not good, tincture of red sanders or cudbear is directed to be added. |
| The manufacture of Archil and cudbear from the various lichens is simple in principle. |
| A mordant of alum, followed by a hot bath of brazil wood, and afterwards by a weak one of cudbear. |
| Various species of Lecanora, particularly L. tartarea, known as cudbear, are used in dyeing woollen yarn. |
