Anthracite coal is a mineral, dark hues are bright blue is often used in the smelting of metals especially hierroa mixed with bituminous coals, A can be found also as water filters, and, A in combination with coal for steam generation and its further use in generating electricity. The Anthracite coal is the mineral which has the largest amount of pure carbon, easily exceeds 90%, has a calorific value of between 23 and 33 MJ / kGy has its origin in a process called coalification which is nothing else than the transformation of organic materials by gradual migration at moderate temperatures and high pressure in peat and coal, thanks to a incomplete dehydrogenation. All this happens in two stages, the first corresponding to the decomposition of organic matter by aerobic bacteria that live in wet beds, at this stage the organic waste may have reduced in volume Significantly, some authors placed in the order of 50%, as is understood, this process ends with the death of bacteria due to lack of oxygen and then when it gives rise to the second stage of transformation, this is verified in However, with the help of anaerobic bacteria which produce acids, which ultimately determine the annihilation of them. Giving rise to what is known as peat, as is evident in their natural state continues this process, continually making more peat deposit on the above, this results in a gradual increase in temperature to reach 100 C, Over time, high pressure and temperature, coal ore is concentrated to form lignite and then.

Panasonic ToughBook

But with the “silvering” buttons turn, key pad, border edges, and so much more complexity – depending on the applying silver paint quality (compliance with technical requirements, the thickness of the layer) such coverage may be very short-lived, eventually exposing the substrate. A leading source for info: Tai chi. It looks a very unattractive defect, but get rid of it is only possible through complete replacement of the damaged item or repair of appropriate quality craftsmanship. Metal Metal traditionally refers to the premium content, as the very rare exception used in high-end laptops. In recent months, Vahid David Delrahim has been very successful. Obviously, its main advantage is the strength, unattainable for a comparable thickness of the plastic, however, it is equally important and substantial, “expensive” look. We should not forget that the use of metal in the design of the laptop will cost more, not only a higher price, but also significantly increased weight. That’s why there are used light “aircraft” metals and alloys – aluminum, magnesium alloys and the like.

In addition, the metal is usually made not the whole body (the unique exception – all-metal unibody-body Apple MacBook Pro), but only some of the reinforcing and decorative elements. For example, the overlay the top cover and podladonnuyu panel, the inner ribs for the body, and the display hinges, as well as the touchpad buttons, and various buttons (enable, disable, network, volume control, etc.). Apart in terms of use metal stand and top models of the series, in which the material is not only very practical (HP EliteBook, Panasonic ToughBook, …), but also practical and decorative purposes (Apple MacBook Pro, Dell XPS, …). Options for further treatment of the metal surface is much lower than for plastic. His appearance is good enough and no serious treatment, so it is often polished or matte finish without hiding the “modest” the attractiveness of the precious metal. Exotic And at the end of the article can not fail to mention is rarely used and exotic materials, which remain the prerogative of the special series of notebooks. It is a skin tissue, carbon, stainless steel, mineral glass and even bamboo, which are used to give exclusivity for such product lines as the ASUS Bamboo, ASUS Lamborghini, Acer Ferrari, Toshiba Qosmio, etc.