EQUIPO DE PRODUCCIÓN DE YESO

According to the composition of the adhesive masses, plasters are divided into ordinary and rubber. Ordinary plasters (Emplastra Ordinarid) are divided into lead, lead-resin, lead-wax and resin-wax depending on the substances prevailing in the plaster base. These patches contain lead soap as a mandatory component, which has the following positive properties: it has no hardness, is easily fused with resins, waxes and various medicinal substances, and is also stable during storage. A negative property of lead soaps is their non-indifference. A simple lead plaster (Emplastrum Plumbi simplex). The group of lead patches includes a simple lead patch, which is chemically a mixture of lead salts of higher fatty acids (stearic, palmitic and oleic), and also contains traces of unsaponified fats and no more than 3% water. The patch consists of 10 parts of sunflower oil, 10 parts of purified pork fat, 10 parts of lead oxide in the smallest powder and distilled water in the amount necessary for the formation of a homogeneous plastic mass. The basis for obtaining this patch is the reaction of saponification of fats with lead oxide in the presence of water at the coating point of the mass in a s...