EP0211621A2
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EP
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Ink composition
Assignee: Adger Kogyo Co Ltd
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Filing: 1986-07-31
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Granted: —
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Expires: 2006-07-31
Abstract
Abstract An aqueous transparent ink composition affording white ink patterns which are erasable with weakly acidic or ammoniacal liquid, and including an aqueous medium, and an ammine complex salt of zinc dissolved in the aqueous medium.
Inventors
- 👤 Zenshiro Iijima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
26 words
An ink composition in the form of an alkaline solution comprising an aqueous medium, and an ammine complex salt of zinc dissolved in said aqueous medium.
Claim 2
Dependent Claim
26 words
An ink composition in the form of an alkaline solution comprising an aqueous medium, and an ammine complex salt of zinc dissolved in said aqueous medium.
Claim 3
Dependent Claim
30 words
An ink composition as claimed in claim 1, further comprising a drying-preventing agent selected from the group consisting of glycerin, alkylene glycols andpolyalkylene glycols having a molecular weight of 200-300.
Claim 4
Dependent Claim
23 words
An ink composition as claimed in claim 1, wherein the amount of said ammine complex salt of zinc is 0.5-30 % by weight.
Claim 5
Dependent Claim
14 words
An ink composition as claimed in claim 1, and having a pH of 8-14.
Claim 6
Dependent Claim
20 words
An ink composition as claimed in claim 2, wherein the amount of said drying-preventing agent is 2-25 % by weight.
Claim 7
Dependent Claim
15 words
A writing instrument having an ink reservoir containing an ink composition according to claim 1.
Claim 8
Dependent Claim
31 words
A writing instrument as claimed in claim 6, further comprising a drying-preventing agent selected from the group consisting of glycerin, alkylene glycols and polyalkylene glycols having a molecular weight of 200-300.
Claim 9
Dependent Claim
23 words
A writing instrument as claimed in claim 6, wherein the amount of said ammine complex salt of zinc is 0.5-30 % by weight.
Claim 10
Dependent Claim
20 words
A writing instrument as claimed in claim 7, wherein the amount of said drying-preventing agent is 2-25 % by weight.
Claim 11
Dependent Claim
45 words
A two component writing instrument, comprising as a first component a felt-tip pen containing an ink composition according to claim 1, and as a second component an eraser including an acidic or ammoniacal liquid capable of erasing ink images written with said first felt-tip pen.
Claim 12
Dependent Claim
25 words
ll. A two component writing instrument as claimed in claim 10, wherein said eraser is a second felt-tip pen containing said acidic or ammoniacal liquid.
References Cited (Backward Citations)
No citation records indexed.
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