| 摘要 |
PURPOSE: Provided is a potassium feldspar which is manufactured by processing and crushing or breaking potassium feldspar into powder, to be efficiently used in commercial products by mixing with raw materials for pottery or oilpaper. CONSTITUTION: A potassium feldspar is prepared by a method comprising; processing potassium feldspar into a desired size and calcining it to 200 deg.C or more. The calcined stone radiates far-infrared ray having 8-15 micrometer of wavelength at a radiation ratio of 0.82-0.93. The potassium feldspar can be crushed into fine powder having 50-2000 mesh of size. The powdered potassium feldspar is mixed and applied to living products or health materials, especially, to soap or cosmetic to remove heavy metals by using far-infrared ray radiation.
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