| 摘要 |
PROBLEM TO BE SOLVED: To provide clay excellent in a coloring property, weather resistance and bleed resistance. SOLUTION: The clay contains a coloring pigment, wherein the mean grain diameter of the pigment is set within the range of 0.05-0.2μm, and the standard deviation of the particle size distribution is set <=0.05μm, and the addition amount thereof is set within the range of 0.1-10 wt.% to the total amount.
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