Poluda

Poloda is a layer of tin covering for protection against corrosion of the inner surface of copper, cast iron cookware, cans and boilers for cooking food, and iron hooks for hanging meat and sausages. Tin plating is called tinning. You can apply only tin, meeting the requirements of GOST 860-60.
Valid impurities to tin in the table.

Name of impurities in % (not more than) Tin brand 01 p. H.* Tin brand 02**
Arsenic
Lead
Copper
Antimony
Bismuth
Iron
Sulfur
0,01
0,025
0,01
0,015
0,01
0,009
0,01
0,015
0,25
0,03
0,05
0,05
0,02
0,02
* Brand 01 p. o'clock is used for blanching tin tin.
** Brand 02 is used for blanching kitchen utensils and food boilers.

Poluda shall be applied evenly, without flows and defects and to be replaced as partial wear regardless of the length of tinning. Tin ware cannot be cleaned sand, brick, knives, etc. and should be washed with water and chemicals (detergents) means. Quality tinned coatingand examined in the laboratory for bestowal in table harmful impurities and porosity. In the allocation of tinned coatingand specified substances separately or together, and in the presence of 1 cm2 over 12 then poloda is considered unsuitable. In recent years instead of tinned coatingand apply other coatings, varnishes, enamel, plastic, metal alloys, resins and etc.

Poluda - a layer of tin, covering the inner surface of copper, iron or tin dishes designed for cooking. In the broader concept of poloda - all anti-corrosion coating of the internal surface of dishes, tin tin, instruments and items of equipment of enterprises of food industry. Poluda happens metal (tin, chrome, Nickel, zinc and others) and non-metallic paint, plastic, glass, enamel and glaze).
Alloy tinning kitchen utensils and devices designed for cooking, storage and consuming food and drinks, must contain lead not more than 1%; for tinning tin tin and the inner surface of the food equipment Pets tin containing lead to 0.04%. Tin tin tin tin successfully replaced lacquer coatings. Antimony content in the tin should not exceed 0.5%. At the enterprises of public catering tinning boilers and utensils should be done at least once in two months.
Glaze is applied for a covering of pottery ware, contains lead. Before using this dish is recommended to boil it a weak solution of acetic acid to extract the lead. Tableware, covered with enamel and glaze, boiling it in a half hour at a 4% solution of acetic acid (by weight) should not be given in the solution of lead.
Cm. also Dishes.