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Water-based ink-jet ink composition, method for suppressing fading of printed images on solid formulations, and solid formulation

A technology of water-based ink and solid preparation, applied in the direction of copying/marking method, printing, ink, etc., can solve the problem of chroma reduction and achieve the effect of improving light resistance and reducing fading

Active Publication Date: 2020-05-01
DAINIPPON SCREEN MTG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the printed image fades due to the photolysis of the dye contained as a constituent of the lake pigment, and the chroma decreases.

Method used

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  • Water-based ink-jet ink composition, method for suppressing fading of printed images on solid formulations, and solid formulation
  • Water-based ink-jet ink composition, method for suppressing fading of printed images on solid formulations, and solid formulation
  • Water-based ink-jet ink composition, method for suppressing fading of printed images on solid formulations, and solid formulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] As shown in the following Table 1, 3.34% by mass of a lake pigment containing Blue No. 2 (dye) as a specific lake pigment (trade name: Blue No. 2 Aluminum Lake, manufactured by Daiwa Kasei Co., Ltd.), 5 mass % 5% by mass of reduced isomaltulose (trade name: Palatinit, manufactured by Mitsui Sugar Co., Ltd.) as a fading inhibitor, 1.66% by mass of polyglycerol fatty acid esters (trade name: SY GLYSTAR, manufactured by Sakamoto Pharmaceutical Co., Ltd.), 25% by mass of propylene glycol as a wetting agent, and 65% by mass of ion-exchanged water were mixed to prepare a blue inkjet aqueous ink composition.

[0088] [Table 1]

[0089]

[0090] Using the aqueous ink composition of this example, printing was performed on one side of the FC sheet by an inkjet recording method. Printing was performed by a multi-pass method using an inkjet printer (PX-105, manufactured by Seiko Epson Co., Ltd.). In addition, printing was performed in the environment of 25 degreeC of air tempe...

Embodiment 2

[0109] As shown in Table 3, 8% by mass of a lake pigment containing Yellow No. 4 (dye) as a specific lake pigment (trade name: Yellow No. 4 Aluminum Lake, manufactured by Daiwa Kasei Co., Ltd.), 1% by mass as a pigment Sodium polyacrylate as a dispersant (trade name: TEGO (registered trademark) Dispers 715W, manufactured by Evonik, mass average molecular weight: 3000), 1% by mass of disodium malate (manufactured by Wako Pure Chemical Industries, Ltd.) as a dispersion stabilizer, and 50% by mass of ion-exchanged water as a dispersion medium was mixed in a container, and the mixed liquid was dispersed with a disperser (paint shaker, manufactured by Asada Iron Works Co., Ltd.) to prepare a dispersion liquid of a specific lake pigment. Next, 12% by mass of reduced isomaltulose (trade name: Palatinit, manufactured by Mitsui Sugar Co., Ltd.) as a fading inhibitor and 15% by mass of isomaltulose as a wetting agent were added to the prepared specific lake pigment dispersion. Propylene...

Embodiment 3

[0111] As shown in Table 3, it was the same as that of Example 2 except that the discoloration inhibitor was changed to galactose (manufactured by Wako Pure Chemical Industries, Ltd.).

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PUM

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Abstract

Provided are: a water-based ink-jet ink composition capable of suppressing fading and discoloration of printed images on the surfaces of solid formulations such as pharmaceuticals and foods; a methodfor suppressing the fading of printed images on solid formulations; and a solid formulation. The water-based ink-jet ink composition contains an edible lake pigment and a discoloration inhibitor. Thelake pigment includes a specific lake pigment comprising a dye containing at least one selected from the group consisting of red No. 2, red No. 3, red No. 40, red No. 102, yellow No. 4, yellow No. 5,blue No. 1, and blue No. 2. The discoloration inhibitor contains at least one selected from the group consisting of a monosaccharide, a disaccharide, a dextrin, and a sugar alcohol. The content of thediscoloration inhibitor is 50 mass% or less with respect to the total mass of the water-based ink composition.

Description

technical field [0001] This application corresponds to Japanese Patent Application No. 2017-185400 filed with the Japan Patent Office on September 26, 2017 and Japanese Patent Application No. 2018-172657 filed with the Japan Patent Office on September 14, 2018. The entire disclosures of these applications are incorporated herein by reference. [0002] The present invention relates to an inkjet aqueous ink composition, a method for suppressing fading of a printed image of a solid preparation, and a solid preparation. More specifically, the present invention relates to an aqueous inkjet ink composition capable of suppressing fading and discoloration of printed images formed on the surface of solid preparations such as pharmaceuticals and foods, a method for suppressing fading of printed images of solid preparations, and solid preparations. Background technique [0003] Inkjet inks for tablets, capsules, etc. are roughly classified into pigment inks in which pigments are dispe...

Claims

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Application Information

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IPC IPC(8): C09D11/322A61K9/44B41J2/01B41M5/00C09D11/38
CPCB41J2/01B41M5/00C09D11/322C09D11/38B41M1/40B41M5/0023B41M5/0088C09B63/00
Inventor 榎本悠人
Owner DAINIPPON SCREEN MTG CO LTD
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