Talk pudrasının kayganlaştırma etkisi üzerine araştırma projesi
First of all chalk is a limestone type and using it is not possible in sports
what they wanted to say(I think that may be a jargon indicating talc) by "chalk" is not limestone chalk (what we use to write on blackboard) but talc powder
or talk pudrası in Turkish. In türkish tebeşir means that kind of chalk writting on balckboard.
In my opinion it must bu talk pudrası.
mineral of calcium carbonate, similar in composition to limestone,
but softer. It is characteristically a marine formation and sometimes occurs
in great thickness; the chief constituents of these chalk deposits are the shells
of minute animals called foraminiferans. Chalk has been laid down in all periods
of geologic time, but most of the best-known deposits, e.g., the cliffs of the English
Channel, date from the Cretaceous period. Chalk is used in the manufacture of putty,
plaster, cement, quicklime, mortar, and rubber goods and also for blackboard chalk.
Harder forms are used as building stones. Poor soils containing an excessive
proportion of clay are frequently improved and sweetened by mixing chalk into them
mineral ranging in color from white through various shades of gray and green to the red and brown of impure specimens, translucent to opaque, and having a greasy, soapy feel. It is a hydrous silicate of magnesium, Mg3Si4O10(OH)2, and usually contains small quantities of nickel, iron, and aluminum as impurities. It occurs commonly in folia (thin layers), but is also found in coarsely granular, finely granular, or cryptocrystalline masses. Soapstone, or steatite, is a massive, granular form of talc. French chalk is a fine-grained variety. Talc is usually associated with chlorite schists, serpentine, dolomite, and other metamorphic rocks; it is apparently a secondary mineral formed by the alteration of other magnesium silicates. There are important deposits of talc in Austria, Italy, France, and Canada and in the United States in California, North Carolina, Texas, Georgia, and Montana. Talc is used in making paper (as a filler), paints, face and talcum powder, soap, fireproof roofing, foundry facings, lubricants, linoleum and oilcloth, electrical insulation, and pottery.
And "tebeşir" never can lubricate anyting
Local time: 06:36
Specializes in field
Native speaker of: Turkish
PRO pts in category: 3