Orcein is obtained from lichen
A. Orchrolechia androgyna
B. Lobaria
C. Parmelia
D. Evernia
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Orcein is obtained from lichen b. Lobaria. Orcein is also regarded as archil, lacmus or orchil. It is considered as traditional way of making dye and urine is employed as the ammonia source.
The conversion is performed in the presence of calcium hydroxide, potassium carbonate as well as calcium sulfate.
Cudbear is also another type of famous dye obtained from the orchil lichens which generates colors in terms of purple range.
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