| 摘要 |
PURPOSE: A crayon pastel for accumulation of light is prepared which increases brightness of light. CONSTITUTION: The crayon pastel comprises more than 1 weight % of light accumulating pigment, 20- 80 weight % of filler containing more than 20 weight % of alumina, 20- 80 weight % of oil and other improving agent. Thus, 5 % light accumulating pigment, 34 % of filler containing 30 % of alumina, 60 % of oil and 1 % of improving agent are mixed to give the crayon pastel. |
