Powdered dye concentrate soluble in alcohol (methylated spirits). The physical appearance often belies the intense colours of these dyes. Picture is of the powdered dye, a swab with 100% denatured alcohol (DAA) & a colour reference chart. Hint: For the most rapid dissolve in water make a slurry of dye first in vinegar & then add water. Smaller quantities available packed by volume in reusable, laboratory rated, storage containers.