# US 12,110,403 B2 · Inkjet ink and tablet

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- Number: US 12,110,403 B2
- Document ID: US12110403B2
- Status: Granted
- Kind: B2
- Application number: 17/029,607
- Filed: 2020-09-23
- Published: 2021-01-07
- Granted: 2024-10-08
- Earliest claimed: 2018-03-29
- Assignees: Toppan Printing Co., Ltd.
- Applicants: Toppan Printing Co.,Ltd.
- Inventors: Yuichi Hoshino; Masatoshi Saito
- Web page: https://patentgrep.com/patent/US12110403B2

## CPC

- C09D 11/322: Pigment inks
- A61K 9/2072: {characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms (A61K9/0004, A61K9/0056, A61K9/0065 take precedence)}
- C09D 11/328: characterised by dyes
- C09D 11/38: characterised by non-macromolecular additives other than solvents, pigments or dyes
- 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)
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)

## Abstract

An inkjet ink in which a food color containing at least sodium copper chlorophyllin and a pigment other than sodium copper chlorophyllin is dispersed in a dispersion medium containing propylene glycol, and which prevents the occurrence of precipitation of the pigment components or other components even when the inkjet ink is stored for a long period of time, and there is also provided a tablet having a print pattern printed by the inkjet ink. The inkjet ink of the present embodiment, which is edible, comprises a food color containing at least sodium copper chlorophyllin and a pigment other than sodium copper chlorophyllin, and a dispersion medium containing propylene glycol, and has a propylene glycol content in the range of 0.001 mass % or more and 19 mass % or less relative to the total mass of the inkjet ink.

## Claims

### Claim 1

An inkjet ink that is edible, comprising:
a food color comprising at least sodium copper chlorophyllin and a second pigment other than the sodium copper chlorophyllin; and,
a dispersion medium consisting of propylene glycol, glycerin and water,
wherein a content of the propylene glycol is in a range of 0.001 mass % or more and 19 mass % or less relative to a total mass of the inkjet ink, the content of the propylene glycol is less than a content of the glycerin.

### Claim 2 (depends on 1)

The inkjet ink of claim 1, wherein the content of the propylene glycol is in a range of 0.01 mass % or more and 2.5 mass % or less relative to a total mass of the inkjet ink.

### Claim 3 (depends on 1)

The inkjet ink of claim 1, wherein a content of the food color is in a range of 1 mass % or more and 10 mass % or less relative to a total mass of the inkjet ink.

### Claim 4 (depends on 1)

The inkjet ink of claim 1, wherein the second pigment is at least one of New Coccine, erythrosine and Brilliant Blue FCF.

### Claim 5 (depends on 1)

The inkjet ink of claim 1, wherein a content of the second pigment in the food color is in a range of 0.1 parts by mass or more and 1.5 parts by mass or less relative to 1 part by mass of the sodium copper chlorophyllin.

### Claim 6 (depends on 1)

A tablet including a print pattern printed using the inkjet ink of claim 1.

### Claim 7 (depends on 6)

The tablet of claim 6, wherein the tablet is a pharmaceutical tablet.