Title:
RECORDING MATERIAL COATING MODIFIED CARBON
Document Type and Number:
Japanese Patent JPH0680923
Kind Code:
A
Abstract:
PURPOSE: To obtain a recording material excellent in long-term dispersion stability of pigment and desirable for use in writing utensils such as a ball-point pen and a sign pen by adding a powdery carbon pigment such as carbon black surface-treated with a fluorine gas to a recording material such as an ink.
CONSTITUTION: The material contains a carbon powder surface-treated with a fluorine gas. It is prepared by mixing a carbon powder surface-treated with a fluorine gas with an untreated carbon powder, a solvent and a resin. The temperature in the surface treatment with a fluorine gas is about -80 to 150°C, and a temperature region of 50°C or below is desirable. The treatment time is usually about 0.5min to 1hr.
Inventors:
IDOKAWA HIROYUKI
WAKATA MASASHI
WATANABE NOBUATSU
TEI YOUHOU
WAKATA MASASHI
WATANABE NOBUATSU
TEI YOUHOU
Application Number:
JP25344992A
Publication Date:
March 22, 1994
Filing Date:
August 31, 1992
Export Citation:
Assignee:
MITSUBISHI PENCIL CO
International Classes:
C01B31/00; C09C1/46; C09C1/56; C09C1/44; C09D11/16; G03G9/12; (IPC1-7): C09D11/16; C09C1/44
Attorney, Agent or Firm:
Hiromitsu Fujimoto (2 outside)