# US 2009/0260540 A1 · Water-based fluorescent ink composition

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- Number: US 2009/0260540 A1
- Document ID: US20090260540A1
- Status: Published application
- Kind: A1
- Application number: 12/427,097
- Filed: 2009-04-21
- Published: 2009-10-22
- Earliest claimed: 2008-04-21
- Assignees: Seiko Epson Corporation
- Inventors: Shuhei Mori
- Web page: https://patentgrep.com/patent/US20090260540A1

## CPC

- C09D 11/322: Pigment inks
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

An ink composition includes C.I. Acid Red 52, C.I. Acid Red 92, C.I. Direct Yellow 87, water, a water-soluble organic solvent, tetraethylene glycol monoethylhexyl ether, and triethylene glycol monobutyl ether.

## Claims

### Claim 1

An ink composition comprising C.I. Acid Red 52, C.I. Acid Red 92, C.I. Direct Yellow 87, water, a water-soluble organic solvent, tetraethylene glycol monoethylhexyl ether, and triethylene glycol monobutyl ether.

### Claim 2

An ink composition comprising C.I. Acid Red 52, C.I. Acid Red 92, C.I. Direct Yellow 87, water, a water-soluble organic solvent, hexaethylene glycol monoethylhexyl ether, and triethylene glycol monobutyl ether.

### Claim 3 (depends on 1)

The ink composition according to claim 1, wherein the total content of tetraethylene glycol monoethylhexyl ether and triethylene glycol monobutyl ether ranges from 1% to 6% by weight of the ink composition.

### Claim 4 (depends on 2)

The ink composition according to claim 2, wherein the total content of hexaethylene glycol monoethylhexyl ether and triethylene glycol monobutyl ether ranges from 1% to 10% by weight of the ink composition.

### Claim 5 (depends on 1)

The ink composition according to claim 1, wherein the content of C.I. Direct Yellow 87 ranges from 3.2% to 4.8% by weight.

### Claim 6 (depends on 1)

The ink composition according to claim 1, wherein the content of C.I. Acid Red 52 ranges from 0.05% to 0.20% by weight, and the content of C.I. Acid Red 92 ranges from 0.5% to 1.2% by weight.

### Claim 7 (depends on 1)

The ink composition according to claim 1, wherein the weight ratio of C.I. Acid Red 52 to C.I. Acid Red 92 ranges from 1:4 to 1:12.

### Claim 8 (depends on 1)

An ink jet printing method for ejecting droplets of an ink composition according to claims 1, further allowing the droplets to adhere to a recording medium to print letters and symbols.

### Claim 9 (depends on 2)

An ink jet printing method for ejecting droplets of an ink composition according to claims 2, further allowing the droplets to adhere to a recording medium to print letters and symbols.

### Claim 10 (depends on 3)

An ink jet printing method for ejecting droplets of an ink composition according to claims 3, further allowing the droplets to adhere to a recording medium to print letters and symbols.

### Claim 11 (depends on 4)

An ink jet printing method for ejecting droplets of an ink composition according to claims 4, further allowing the droplets to adhere to a recording medium to print letters and symbols.

### Claim 12 (depends on 5)

An ink jet printing method for ejecting droplets of an ink composition according to claims 5, further allowing the droplets to adhere to a recording medium to print letters and symbols.

### Claim 13 (depends on 6)

An ink jet printing method for ejecting droplets of an ink composition according to claims 6, further allowing the droplets to adhere to a recording medium to print letters and symbols.

### Claim 14 (depends on 7)

An ink jet printing method for ejecting droplets of an ink composition according to claims 7, further allowing the droplets to adhere to a recording medium to print letters and symbols.