Title:
AQUEOUS DECOLORABLE INK COMPOSITION FOR USE IN WRITING INSTRUMENTS
Document Type and Number:
WIPO Patent Application WO/2007/063892
Kind Code:
A1
Abstract:
The object is to overcome disadvantages of conventional aqueous decolorable ink compositions for writing instruments. Thus, provided is an aqueous decolorable ink composition for writing instruments which can be decolored or can be discolored rapidly when a mark with the ink composition is followed by an decoloring ink composition, and has good workability. The ink composition comprises water, a basic dye which can be decolored with a reducing agent, and at least one auxiliary agent for decoloration selected from di(long-chain alkyl)di(lower alkyl)ammonium halides. The reducing agent is preferably sodium or potassium sulfite.
Inventors:
NAKAMURA KEIKO (JP)
Application Number:
PCT/JP2006/323801
Publication Date:
June 07, 2007
Filing Date:
November 29, 2006
Export Citation:
Assignee:
SAKURA COLOR PROD CORP (JP)
NAKAMURA KEIKO (JP)
NAKAMURA KEIKO (JP)
International Classes:
C09D11/16; C09D11/17
Foreign References:
| JP2001518138A | 2001-10-09 | |||
| JPS5018048A | 1975-02-26 | |||
| JP2000158817A | 2000-06-13 |
Attorney, Agent or Firm:
MAKINO, Itsuro (3-3 Showacho 2-chome, Abeno-k, Osaka-shi Osaka, JP)
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