Jewel powder

Jewel Powder. One of the early American smokeless proplnts of the Ballistite type (See Vol 2 of Encycl, p B8-L) proposed by Monroe Ref Daniel (1902), pp 387 447... 

Stein-korper, m. stony body, (Bot.) stone cell or cell cluster- -kraut, n. stonecrop (Sedum), also various other plants, -lager, n. jeweled bearing, -malz, n. glassy or vitreous malt, -mark, n. (Min.) lithomarge. -mauer, /, stone wall brick wall, -mehl, n. stone powder, -meissel, m. stone chisel, -metz, m. stonemason, -mortel, hard mortar concrete (Portland) cement badigeon, -nuss, /. ivory nut- -obst, n, stone fruit, -til, n, petroleum. 

Corundum or alumina is again faster than emery, but it is much more expensive. Finally, diamond powder can be twed, and is very fast but by far the most expensive. Once the glass has been ground it can be polished with jeweller s rouge or Cerirouge (see p. 83). With these polishes an optical finish may be obtained. 

Jewelers and diamond cutters, however, were skeptical. To remove certain flaws, they had often heated diamonds, carefully packed in chalk dust and powdered charcoal, and had never experienced any loss. After several inconclusive experiments had been made by others, Maillard, a famous gem cutter, placed three diamonds, closely packed in charcoal dust, in the bowl of a tobacco pipe, and enclosed it in sheet iron inside a crucible filled with a lining of chalk dust and a fusible sand used for castings. After moistening the mixture with salt water and letting it dry, Maillard heated the crucible in Macquer s furnace. The contents soon became so fluid that it was necessary to allow the furnace to cool. 

Orpiment of gold color, 20 drachmas powdered glass, 4 staters or white of egg, 2 staters white gum, 20 staters saf ran. . After writing, let it dry and polish with a tooth. (An animal s tooth used by jewelers for polishing.)... 

JEWELER S ROUGE (1309-37-1) Violent reactions with powdered aluminum (thermite reaction), hydrogen peroxide, calcium disilicide (thermite reaction), ethylene oxide (may cause explosive polymerization), calcium hypochlorite, hydrazine, hydrogen trisulfide, powdered magnesium. Incompatible with powdered calcium carbide, carbon monoxide, chlorides, guanidinium perchlorate, metal acetylides. Contact with the explosive hydrazinium diperchlorate or ammonium perchlorate can be made more heal-, shock-, or friction-sensitive. Incompatible with aluminum-magnesium-zinc alloys. 

The flame fusion technique (see Figure 7.20b) was originally devised in 1904 by Verneuil for the manufacture of artificial gemstones, such as corundum (white sapphire) and ruby. This method is now used for the mass production of jewels for watches and scientific instruments. A trickle of fine alumina powder plus traces of colouring oxides is fed at a controlled rate into an oxyhydrogen flame. Fusion occurs and the molten droplets fall on to a ceramic collecting rod. A seed crystal cemented to the rod is fused in the flame and the rod is lowered at a rate that allows the top of the growing crystal (known as a boule) to remain just molten. Renewed interest has recently been shown in this method for the production of rubies for lasers. 

Jewelers rouge ju-9-brs riizh esp. Southern iij n. Very fine and pure ferric oxide (Fe203) powder used for polishing metals and plastics. Rouge paper contains the same abrasive glued to paper. It also comes in cloth form, called crocus cloth. James F (ed) (1993) Whittington s dictionary of plastics. Technomic Pubhshing Co. Inc., Carley. 

Sculptured nails are custom-made by the manicurist on a template attached to the natural nail plate. The nail plate is sanded a template is fit beneath the distal end of the nail and surrounds the other sides of the nail. The nail is coated with a primer that contains methacrylic acid. The liquid monomer and powdered polymer are mixed and painted on the nail and template extension. The sculptured nail is sanded to the desired form. Jewels, decals, and decorative metal strips can be added. As the nails grow out, the manicurist must fill with the same chemicals at the base above the cuticle every 2-3 weeks. The components and examples of the chemicals included are (Quenon 1989 Freeman et al. 1995) ... 

The main results in Lavoisier s first memoir are (i) diamonds heated in retorts in a confined volume of air are partly consumed, (ii) Maillard (a jeweller) during the course of the work showed that diamonds embedded in charcoal powder are not consumed, which was confirmed, (iii) a diamond heated with charcoal powder and iron was dissolved where it was in contact with molten iron, either by evaporation or scorification by the iron , (iv) diamonds enclosed in balls of unglazed porcelain disappeared, but so did charcoal, since the porcelain was porous, and (v) Mitouard found that a diamond embedded in charcoal powder in a tobacco pipe lost neither in weight nor polish, but embedded in clay or in an empty pipe lost a fifth of its weight and became brown or black. 

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