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Patent Searching and Data


Title:
UNBAKED COLORED PENCIL LEAD
Document Type and Number:
Japanese Patent JPH10330679
Kind Code:
A
Abstract:

To obtain a colored pencil lead, having not only writing quality, color developing properties and erasability with a rubber eraser but also a bending strength sufficient to use especially as a colored pencil lead having ≤2 mm diameter for mechanical pencils and good in color developing properties for not only a white plain paper but also even a black paper.

This unbaked colored pencil lead contains N -lauloyllysine and boron nitride and titanium dioxide whiskers used as a body material in its amount of 58-65 wt.% based on the whole (except the amount of a solvent used when the solvent is used) and the amount of the boron nitride used is within the range of 17-60 wt.% based on the amount of the titanium dioxide whiskers used in the unbaked colored pencil lead using at least a binder, the body material, a colorant and a lubricant.


Inventors:
MIYAHARA YUICHI
Application Number:
JP15578997A
Publication Date:
December 15, 1998
Filing Date:
May 29, 1997
Export Citation:
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Assignee:
PENTEL KK
International Classes:
B43K19/02; C09D13/00; (IPC1-7): C09D13/00; B43K19/02