Leather-dust

Leather dust in boot and shoe manufacture, arising during preparation and finishing... 

Cementation process. This process, now little used, consists of heating wrought iron or low-carbon steel in powdered charcoal or leather dust for 6 to 11 days in a closed boxlike furnace at 650 to 700°C. At these temperatures, carbon diffuses slowly into the surface of the steel, thus producing a thin coat of high-carbon steel over a core of low-carbon steel. This is essentially a case-hardening procedure, and steel produced in this manner is used largely in the manufacture of tools. 

Examples of a few are alpha cellulose, ash, calcium carbide, calcium carbonate, carborundum, channel black, china clay, coral, coke dust, diatomaceous earth, dolomite [double carbonate of lime and magnesia filler having the formula (CaCOg) and (MgCOg)], ferrite, flint, fixller s earth, glass spheres, hemp, keratin, lampblack, leather-dust, macerate... 

Leather dust Nasal sinuses Leather workers... 

Potassium forms corrosive potassium hydroxide and Hberates explosive hydrogen gas upon reaction with water and moisture. Airborne potassium dusts or potassium combustion products attack mucous membranes and skin causing bums and skin cauterization. Inhalation and skin contact must be avoided. Safety goggles, full face shields, respirators, leather gloves, fire-resistant clothing, and a leather apron are considered minimum safety equipment. 

And as she speaks, as if she s given me the vision I was denied in the car and at the castle, Anthony is present in me his body absorbing the movement of his horse, the creak of saddles, the clink of bits and swords, the dust in his nose and the scent of hot, worn leather, and always, part of his bodily existence, the knowledge that where he was going was death. 

Proteolytic enzymes Animals, including insects and other arthropods or their larval forms Dusts from barley, oats, rye, wheat or maize, or Biological washing powders and the baking, brewing, fish, silk and leather industries Research and educational laboratories, pest control and fruit cultivation The baking or flour milling industry or on farms... 

Dry dusts and powders Fine rubber dust, bakelite moulding powder dust, cotton dust, light shavings, soap dust, leather shavings 3000-4000 15-20... 

The Leather Man has long since turned to dust. In the 1930s, Shrub Oak became a popular summer destination for families in New York City and lower Westchester. I landed here in the early 1980s, after graduating from Yale. Sushi didn t come to our town until a few years ago. 

In such a plant, conditions are particularly favourable for the accumulation of static electricity, due to friction between the crystals themselves, and between the crystals and parts of the plant, even between the crystal and the air, during drying. All the parts of the plant should therefore be well earthed. If they are manufactured of non-conductive material, as for example, plastics, ebonite or leather, these materials should contain conductive substances such as graphite or aluminium dust, to help dissipate the static electricity generated. 

Lead, lead oxide, leather wastes, LD-dust, lignite, lime, limestone, lithium carbonate, lithium fluoride, lithium hydroxide... 

Temperature is a significant factor friction may raise the temperature of the surface layers to the point where they become subject to chemical attack. Abrasion causes deterioration of many materials, especially of rubber (tire treads), where it can be offset by a high percentage of carbon black. Other materials subjected to abrasion in their service life are textiles (laundering), leather and plastics (shoe soles, belting), and house paints and automobile lacquers (airborne dust, grit etc.). 

Zinc is frequently applied to the surface of iron or steel by other methods. In the Schoop process, molten zinc is sprayed onto the surface by a blast of air in a manner similar to that used in spraying paint. In addition to metals, objects made of wood, leather, paper, and the like may be coated with zinc by this process. In the process of sherardizing, iron is covered with a thin layer of zinc dust at temperatures of 700 to 800°C. Under these conditions, zinc penetrates the surface of the iron to a considerable extent. 

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