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sdo:abstract
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"To dye anything red, take cinnabar and rub it well on a hard stone with alum water and uses that to dye with. To make a red color darker, mix it with black dye or with verdigris and add alum; then cook everything in vinegar and take brasilwood and boil everything in human urine. Also, brasilwood mixed with alum, mixed with vinegar or with urine [makes a red color darker]"
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