Modelling-clay
Common potters'-clay mixed with water will answer for inferior work; for work of superior quality dry clay may be brought to the right consistency with glycerine; but for models requiring considerable time for their completion, and to avoid the repeated moistening to which they must be subjected, it is best to use a clay composed of: clay 3, sulphur 6, oxide of zinc 1, fatty acids 2, fats 10. First saponify the zinc-white with oleic acid, which then mix with the other fatty acids; add sulphur in flowers, and the clay in dry powder. See OILS; ZINC; POTTERY.