Novel non-baked color pencil leads are here disclosed which can be obtained by forming a blend composition from a filler, a pigment, a binder and the like without using any wax, at least one of the pigment and the filler being all or partially covered with a fluorinated aromatic compound, kneading the blend composition with a solvent and/or a plasticizer, extruding the kneaded material, drying the extruded articles to remove the solvent and/or the plasticizer therefrom, and then impregnating the porous articles with an oil, a fat and/or a wax. Color pencil leads which can be erased with an eraser or color pencil leads which cannot be erased with an eraser can be selectively prepared.
本发明公开了新型非烘烤彩色
铅笔芯,这种
铅笔芯可以通过以下方法获得:在不使用任何蜡的情况下,将填料、
颜料、粘合剂等制成混合组合物,
颜料和填料中至少有一种全部或部分覆盖有
氟化芳香族化合物;用溶剂和/或
增塑剂捏合混合组合物;挤压捏合材料;干燥挤压制品以除去其中的溶剂和/或
增塑剂;然后用油、脂肪和/或蜡浸渍多孔制品。可以有选择地制备出可以用橡皮擦擦除的彩色
铅笔芯或不能用橡皮擦擦除的彩色
铅笔芯。