Smith, G. / The laboratory; or, School of arts: containing a large collection of valuable secrets, experiments, and manual operations in arts and manufactures, highly useful to gilders, jewellers, enamellers, goldsmiths, dyers, cutlers, pewterers, joiners, japanners, book-binders, plasterers, artists, and to the workers in metals in general; and in plaster of paris, wood, ivory, bone, horn, and other materials
[Part VI.] Several curious secrets relating to ivory, bone, and horn, pp. 277-283
8 :THE tABORATOFY. it with a hair cloth, and wipe it over with a clean napkin, or linen rag, moistened; in this let it lie, till it dries gra. -dually, else it will.be.apt to split, Awther Method to whiten Green Ivory. BtOL the ivory in water And qpicklime, till you see it has a good white, To imitate Marble upon Ivory. MEL T bees-wax and tallow together, or else yellow and white bees-wax, and lay it over your ivory; then with an ivory bodkin, open the strokes that are to Imitate marble; pour the solution of some metal or other on them, and let, it stand a little while; then pour it off, and when it is dry, cover those strokes again with wax, and open some other veins with your bodkin for anotler metallic solution; and this repeat to the number of'colours you design togivc it. N. B. The solution of gold gives it a purple; of copper, a green; of silver, a lead-black; of iron, a yellow and brown colour. These solutions well managed, and applied on ivory, will intirely answer the design of the artist. By this method you may imitate tortoise-shel, and sevC, ral other things, on ivory. To stain Ivory of a fine Green, TAKE tWO parts of verdigrise an. one part of saI- ammoniac; grind them well together, pour strong white- wine vinegar on them, and put your ivory in; let it lie covered, till the colour has penetrated, and is deep enough to your likeing, If you would have it marbled or spotted, sprinkle or marble it with wax.
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