Now, it is heated up with

Boric acid is also usually used as a disinfectant in hospitals. The drill in ancient times already knew for the Arab alchemists, they receive to the drill from Tibet, China. Pine forest - the rare earth elements in other countries. However, in China, there is a richness of ore drills, pine forest in China not a rare element, and high development elements! Though noted business relations have drills long history, however, pure, free pine forest of a form, to 1808 Davids Frensas Geylvseyks made by the United Kingdom and Secret. Pure pine forest - a dark brown powder of pine forest similar to a rust, together with aluminum to heat up and thaw, after cooling, there can be received pieces of transparent pine forest. The crystal of pine forest is very firm, the same as diamond, and they огнеупорны, a melting point 2075 of C, it was used in the mechanical industry instead of expensive diamond production cutting tools and training. Now, it is heated up with the platinum wire, the raised tribromide Pine forest of pairs, in 1500 tribromide pine forest decomposition, and receive pure pine forest. Use of pine forest of a free condition not too big. In the industry added million of pine forest to aluminum, copper, nickel and other metals, can improve mechanical properties of these metals.

Use drills much more widely, than a free condition of pine forest in the industry, which it uses to make porcelain, especially fusible enamel of glaze. The drill, also earlier, made a set of fire-resistant glass and a filler as soap.