Sell hard (white ) charcoal |
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Art.no 050 diameter length 6.0cm-4.5cm 20cm-10cm 4.5cm-3.5cm 20cm-10cm 3.5cm-2.5cm 20cm-10cm 6.0cm-4.0cm 20cm-10cm 4.0cm-2.0cm 20cm-10cm 15kg/carton White Charcoal was invented by Japanese 300 years ago. It is known by many Japanese now. The hard Charcoal has effected their life in varied aspects. white charcoal is make from holm oak(tungsten steel tree) that is a very hard wood. White charcoal is made by charring the wood at a relatively low temperature for some time, then, near the end of the process, raising the kiln temperature to about 1000oC to make the wood red-hot. The charcoal is then pulled out and quickly smothered with a covering of powder to cool it. The powder is a moist mixture of earth, sand and ash, and gives a whitish hue to the charcoal surface. This explains the name "white charcoal." The rapid rise in temperature, followed by a rapid cooling, incinerates the bark and leaves a smooth, hard surface. If you strike it, you'll hear a clear, metallic sound. More Reasons For Charcoal's Comeback Charcoal is attracting attention because its unique characteristics can be used in many ways. It has so many tiny cavities oriented in so many directions that one gram of charcoal has a surface area of about 250 m2. The cavities can attach different substances to their walls, then release them later. For example, they absorb moisture from humid air, then release it during dry conditions. This makes charcoal an excellent humidity regulator. Charcoal has other benefits, it absorbs unpleasant room odors and harmful substances; it generates negative ions that are said to put people in a better frame of mind; and it exerts a far-infrared effect that supposedly improves blood circulation. Researchers in Japan are examining these benefits, exploring new uses to develop innovative products like... |
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