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Method for increasing the tensile, breaking and flexural strength of colored leads and colored pencils containing the same
Method for increasing the tensile, breaking and flexural strength of colored leads and colored pencils containing the same
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机译:增加有色铅芯和包含其的有色铅笔的拉伸,断裂和弯曲强度的方法
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摘要
A method for increasing the tensile, breaking and flexural strength of coloured leads. The method is characterized in that 1 to 50 percent by weight alkyl and/or hydroxyalkyl cellulose which are soluble in organic solvents and whose alkyl radicals can be straight-chained or branched are added to the lead substance. The invention also relates to coloured pencils containing said coloured leads.
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