| 摘要 |
PURPOSE: A coloring method of natural granite is provided to improve durability of the natural granite against weather, light, and heat. CONSTITUTION: A coloring method of natural granite comprises the following steps: preparing a chromogenic composition; cutting the natural granite in the thickness of 5-100mm; removing moisture remained inside the natural granite; coating the surface of the dehydrated talcum natural granite with the chromogenic composition and oxidation catalyst nitrate; drying the spread talcum natural granite; and polishing the surface of the talcum natural granite in thickness of 1-5mm. The chromogenic composition is yellow chromogenic composition including 10-20 weight% of ferric nitrate (F2(NO3)2,XH2O), 3-5 weight% of aluminium nitrate (Al(NO3)3), 5-10 weight% of calcium carbonate (CaCO3), 2-5 weight% of magnesium carbonate (MgCO3), 3-6 weight% of fluorination hydrogen (HF), 3-5 weight% of pottassium chlorate (KCLO3), and 60-74 weight% of distilled water.
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