Inkjet aqueous ink composition, method for suppressing fading of printed image of solid preparation, and solid preparation
A technology of water-based ink and solid preparation, which is applied in the direction of duplication/marking, ink, printing, etc., can solve the problems of reduced saturation of printed images, light fading, and green printing of printed images, so as to improve moisture resistance and light resistance, Reduces the effect of light fading
Active Publication Date: 2021-12-03
DAINIPPON SCREEN MTG CO LTD
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AI Technical Summary
Problems solved by technology
[0004] However, if sugar-coated tablets etc. are printed with black dye ink and left for a certain period of time, there is a problem that the printed image will turn green (green shift)
In addition, when a red azo-based dye is used as a constituent of the black dye, there is also a problem that the chroma of the printed image decreases with time due to photodecomposition of the azo-based dye, resulting in photofading.
Method used
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Examples
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Effect test
Embodiment 1～24
[0113] The aqueous ink compositions used in Examples 1 to 24 are shown in Tables 3 to 5 below. In addition, as for the fading inhibitors, those shown in the following Tables 3 to 5 were used, respectively. In addition, as reduced isomaltulose used in Examples 16 to 18, PALATINIT (registered trademark, manufactured by Mitsui Sugar Co., Ltd.) was used.
[0114] [table 3]
[0115]
[0116] [Table 4]
[0117]
[0118] [table 5]
[0119]
[0120] Using the aqueous ink composition of each example, printing was performed on one side of a sugar-coated tablet (sugar-coated layer is sucrose) by an inkjet recording method. Printing is performed in a single-pass (one-pass) manner using an inkjet printer (KC 600dpi head, medium-speed printing fixture). In addition, printing was performed in the environment of 25 degreeC of air temperature, and 40% of relative humidity. Thereafter, the printed surface is fully dried by directly blowing hot air with a dryer. Thus, samples of e...
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The present invention provides an aqueous inkjet ink composition capable of suppressing fading and discoloration of printed images 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. The ink-jet water-based ink composition related to the present invention is an ink-jet water-based ink composition for printing on solid preparations, and is characterized in that it contains an edible dye and a fading inhibitor, and the aforementioned dye contains red No. 2, at least one specific dye from the group consisting of Red No. 4, Red No. 40, Red No. 102, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1 and sodium copper chlorophyllin and other dyes as optional components, The aforementioned fading inhibitor is at least one selected from the group consisting of monosaccharides, disaccharides, dextrins and sugar alcohols, further, relative to the total mass of the aforementioned water-based ink composition, the content of the aforementioned fading inhibitor It is 50 mass % or less.
Description
technical field [0001] The present invention relates to an inkjet water-based ink composition, a method for suppressing fading of a printed image of a solid preparation, and a solid preparation, and more particularly, to an inkjet capable of suppressing fading and discoloration of a printed image formed on the surface of a solid preparation such as pharmaceuticals and food A water-based ink composition, a method for suppressing fading of a printed image of a solid preparation, and a solid preparation. Background technique [0002] Inkjet inks for tablets, capsules, etc. are roughly classified into pigment inks in which pigments are dispersed and dye inks in which dyes are used. In general, dye inks have the advantage of being easy to permeate into tablets and the like and fixing the dye inside. On the other hand, the penetration force of the pigment ink to the inside is small, so the plain tablet without coating on the surface of the tablet can penetrate into the inside. H...
Claims
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IPC IPC(8): C09D11/328B41J2/01B41M5/00C09D11/38
CPCB41J2/01B41M5/00C09D11/328C09D11/38
Inventor 榎本悠人森川聪一郎
Owner DAINIPPON SCREEN MTG CO LTD