rgya tshos

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རྒྱ་ཚོས
vermilion, red pigment from india [JV]

lac dye, red ink, CH vermilion, spu phrug rgya tshos [IW]

lac dye, red ink, Chinese vermilion [RY]

(med) Raw lac, lac encrustations
Illustration : 'Phrin Las 1987 (29_033) rgya tshos (34_024) rgya tshos
The illustrations in the Medical Thangkas suggest that rgya tshos are detached lac encrustations, freed from the branches of the hostplant (or sticklac, see rgya skyegs). Through further refinement with heat one obtains shellac (laksha).
Johannes Schmidt (talk) 15:41, 18 March 2024 (EDT)