CN111363402A - Red special color ink for conch bead offset printing - Google Patents
Red special color ink for conch bead offset printing Download PDFInfo
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- CN111363402A CN111363402A CN202010272753.3A CN202010272753A CN111363402A CN 111363402 A CN111363402 A CN 111363402A CN 202010272753 A CN202010272753 A CN 202010272753A CN 111363402 A CN111363402 A CN 111363402A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D11/00—Inks
- C09D11/02—Printing inks
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Abstract
The invention discloses a conch pearl red special color ink for offset printing, which comprises the following raw materials in percentage by mass: 8.0 to 9.0 percent of scarlet ink; peach red ink 80.0-81.0%; and the transparent ink is 11.0-12.0%. The Conch pearl special color ink for offset printing is prepared by adopting the formula, the Conch pearl special color ink (Conch Pink) can replace the Magenta primary color ink in the four primary colors Cyan/Magenta/Black of offset printing, and the Conch pearl special color ink (Conch Pink) uses peach Red (Rhodamine) and scarlet Red (Rubine Red) pigments with bright and saturated colors, so that the Conch pearl special color ink has brighter colors, higher saturation and more blue hue compared with the Magenta ink, and meets the requirements of the primary colors of offset printing.
Description
Technical Field
The invention relates to the technical field of ink, in particular to a red special color ink for conch beads for offset printing.
Background
Needless to say, ISO12647-2, part 2 control of the process of printing, halftone, proof, and finished printed products, offset printing, is the most widely used offset printing process standard for printing enterprises. The standard is a strong foundation for performing printing standardization evaluation and correction, and with the standard, printing standardization and process control can be effectively performed. The standard was promulgated in 1996 and was revised once in each of 2004 and 2013, respectively. Currently, the ISO12647-2 standard executed by printing enterprises in offset printing production is 2004 edition mostly, and the standard has some differences from the current actual printing conditions, so that the printing enterprises need to carry out new control on prepress and printing processes of the enterprises according to the 2013 ISO12647-2 standard.
The main differences between ISO12647-2 standards, 2004 and 2013:
the main differences between ISO12647-2 standards, 2004 and 2013, are in the definition of paper type, ink color, dot gain, etc.
1. Paper type: the 2013 version of the standard defines a brand-new 8 types of paper, the paper type is changed from 5 types to 8 types, and the CIE Lab chromatic value of the paper is also changed correspondingly. The paper type defined by the 2013 standard is closer to the paper type used by most printing enterprises in China, and more accords with actual production.
2. Ink color: the 2013 version of the standard changes the ink color from 5 to 8 according to the paper type defined by the standard, and the CIE Lab chroma value of the ink color is changed correspondingly. It is also reasonable that the ink colors are updated accordingly, depending on the paper type.
3. Dot gain rate: under the current mainstream CTP plate making process, a larger increase of the tone value occurs in a bright tone part, which is opposite to the situation in the 2004 standard, and a larger increase of the tone value occurs in a middle tone part and a dark tone part in the 2004 standard.
The control process of ISO 12647-2:2013 standard is realized in the digital proofing link:
the GMG digital proofing software is taken as an example, and the control process of realizing ISO 12647-2:2013 in the digital proofing link is introduced.
1. Inputting an ICC file: in GMG digital proofing software, an ICC file (PSO Coated V3.ICC, namely Fogra51.ICC) conforming to ISO 12647-2:2013 standard is input as a target value of digital proofing.
2. Cyclic correction of digital proofing: outputting an ECI2002_ CMYK _ iO.GIF test sample by using a digital proofing machine, measuring by using a spectrophotometer, taking the measured data as the current value of the digital proofing, comparing the current value with a target value to obtain the color block number of the maximum Δ E, the average Δ E and the maximum Δ E >3, and if the proofing result does not meet the standard requirement, calculating the target value and the current value and reprinting; and ending the process control if the requirements are met.
Offset printing involves CIE Lab and CIE Lch color spaces, color gamut, hue and saturation: wherein CIE Lab is a color system of CIE, and the color system is based on the color system and is basically numerical information for determining a certain color; the CIE Lch color space uses the same color space as L a b, but it uses L to represent the lightness value; c represents a saturation value and H represents a hue angle value to obtain a cylindrical coordinate; gamut is the method of encoding a color, also referred to as the sum of colors that a technical system is capable of producing, and in computer graphics processing, gamut is some complete subset of colors, which is most commonly used to accurately represent a given situation, such as a given color space or the rendering range of an output device; the hue is the principal characteristic of color, and is the most accurate standard for distinguishing various colors, and in fact, colors other than black, white and gray have the attribute of hue, and hue is formed by primary color, secondary color and compound color, and the hue and color can present texture appearance, and various hues in nature are infinite and abundant, such as purplish red, silver gray, orange yellow and the like, and the hue is the appearance of various colors and is called; saturation can be defined as chroma divided by lightness, which is the same as chroma, which characterizes how a color deviates from a gray of the same brightness, and it is noted that chroma is not the same concept at all, but because it and chroma determine the same effect that appears in the human eye, it is the case that chroma and saturation are considered the same concept.
The current offset lithographic printing is based on the ISO 12647-2:2013 standard, offset lithographic printing, which as the name implies refers to a printing plate with the image and text of the printing surface and the blank in one plane. The ink of the pattern part is transferred to a printing stock through a rubber blanket in an indirect mode, which is called offset lithography for short. In the prior art, offset lithographic printing typically uses 4 primary colors to reproduce the product colors, Cyan (Cyan)/Magenta/Yellow/Black (Black), respectively; the primary color ink is influenced by the color of the produced pigment, so that the actual color is different from the theoretical target, particularly Magenta; the defects are as follows:
1. magenta ink is yellow in color; resulting in a Yellow color shift of the Cyan + Magenta + Yellow + Black four-color print.
2. Magenta ink saturation is low; the color of the four-color printing product of Cyan + Magenta + Yellow + Black is dark and not bright enough, and the use requirement cannot be met.
Therefore, there is a need to develop a solution to the above problems.
Disclosure of Invention
In view of the above, the present invention is directed to the defects existing in the prior art, and the main object of the present invention is to provide a sepia pearl red special color ink for offset printing, which can effectively improve the defects of dark color and Yellow color of the conventional four-color prints of Cyan + Magenta + Yellow + Black.
In order to achieve the purpose, the invention adopts the following technical scheme:
the conch pearl red special color ink for offset printing comprises the following raw materials in percentage by mass: 8.0 to 9.0 percent of scarlet ink; peach red ink 80.0-81.0%; and the transparent ink is 11.0-12.0%.
As a preferable scheme, the color value of the conch bead red special color ink for offset printing is L48.0 a83.5b-18.0, the adopted measuring instrument is X-rite Exact, the color setting is adopted, the measuring condition is M1, the light source and the visual angle are D50/2 degrees, the color difference formula is CIE △ E (2000), and the color difference requirement is △ E < 1.5.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and specifically, the technical scheme includes that:
the Conch pearl special color ink for offset printing is prepared by adopting the formula, the Conch pearl special color ink (ConchPink) can replace the Magenta primary color ink in the four primary colors Cyan/Magenta/Black of offset printing, and the Conch pearl special color ink (Conch Pink) uses peach red (Rhodamine) and scarlet (Rubineered) pigments with bright and saturated colors, so that the Conch pearl special color ink has brighter colors, higher saturation and more blue hue compared with the Magenta ink, and meets the requirements of the primary colors of offset printing.
Drawings
FIG. 1 is a schematic illustration of a color comparison of a preferred embodiment of the present invention with a magenta ink;
FIG. 2 is a schematic illustration of a color gamut comparison of a preferred embodiment of the present invention with magenta ink;
FIG. 3 is a schematic diagram of a comparison of a sample sheet of magenta ink according to a preferred embodiment of the present invention.
Detailed Description
The invention discloses a conch pearl Red special color ink for offset printing, which comprises the following raw materials, by mass, 8.0-9.0% of big Red ink (Rubine Red), 80.0-81.0% of peach Red ink (Rhodamine), 11.0-12.0% of transparent ink (Trans White), wherein the formula of the conch pearl Red special color ink for offset printing is preferably 8.5% of big Red ink, 80.5% of peach Red ink, 11.0% of transparent ink, the color value of the conch pearl Red special color ink for offset printing is L48.0 a83.5b-18.0, the adopted measuring instrument is X-rite Exact, and the color setting is carried out under the measuring conditions of M1, the light source and the visual angle are D50/2 degrees, the color difference formula is CIE △ E (2000), and the color difference requirement is △ E < 1.5.
When in manufacturing, the scarlet ink, the Pink ink and the transparent ink are mixed uniformly according to the proportion to obtain the Conch pearl red special color ink (Conch Pink) for offset printing.
The red special color ink of the conch bead for offset printing of the invention is compared with the magenta ink:
first, the color value of magenta ink (magenta) is: l48.0 a 73.5 b-5.2, analyzed from the color data of the two inks, the concha pearl special red ink (Conch Pink) for offset printing according to the present invention has a darker a value and a smaller b value than the magenta ink (magenta), and as shown in fig. 1, the concha pearl special red ink (Conch Pink) for offset printing has a brighter color, higher saturation and a bluish overall visual effect than the magenta ink (magenta).
Secondly, as shown in fig. 2, a color gamut contrast graph of Cyan + Conch Pink + Yellow + Black four-color printing and a color gamut contrast graph of Cyan + Magenta + Yellow + Black four-color printing are shown, wherein a blue line area is a CMYK color gamut, and a gray line area is a CCYK color gamut.
ISO12647-2(2013) primary color target value (CIE Lab color space):
Subtrate:L 95.0 a 1.5 b -6.0；
Cyan:L 56.1 a -34.9 b 52.5；
Magenta: L 48.0 a 75.3 b -5.2；
Yellow: L 88.9 a -4.0 b 92.4；
Black: L 16.0 a 0.1 b -0.3；
CCYK primary color target value (CIE Lab color space;
Subtrate:L 95.0 a 1.5 b -6.0；
Cyan:L 56.1 a -34.9 b 52.5；
Conch Pink: L 48.0 a 83.5 b -18.0；
Yellow: L 88.9 a -4.0 b 92.4；
Black: L 16.0 a 0.1 b -0.3。
furthermore, as shown in fig. 3, the color contrast between the four-color printing of the Cyan + Conch Pink + Yellow + Black and the four-color printing of the Cyan + Magenta + Yellow + Black is shown, and the defects that the color of the printing sheet of the Conch bead red special ink (Conch Pink) is obviously brighter, purplish red and brighter than that of the printing sheet of the Magenta ink (Magenta), and the Magenta ink (Magenta) is Yellow and insufficiently saturated are obviously improved.
The design of the invention is characterized in that: the Conch pearl special color ink for offset printing is prepared by adopting the formula, the Conch pearl special color ink (Conch Pink) can replace the Magenta primary color ink in the four primary colors Cyan/Magenta/Black of offset printing, and the Conch pearl special color ink (Conch Pink) uses peach Red (Rhodamine) and scarlet Red (Rubine Red) pigments with bright and saturated colors, so that the Conch pearl special color ink has brighter colors, higher saturation and more blue hue compared with the Magenta ink, and meets the requirements of the primary colors of offset printing.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (2)
1. The conch pearl red special color ink for offset printing is characterized by comprising the following components in parts by weight: the material consists of the following raw materials in percentage by mass: 8.0 to 9.0 percent of scarlet ink; peach red ink 80.0-81.0%; and the transparent ink is 11.0-12.0%.
2. The conch pearl red special color ink for offset printing is characterized in that the color value of the conch pearl red special color ink for offset printing is L48.0 a83.5b-18.0, the adopted measuring instrument is X-riteExact, the color setting is that the measuring condition is M1, the light source and the visual angle are D50/2 degrees, the color difference formula is CIE △ E (2000), and the color difference requirement is △ E < 1.5.
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| CN202010272753.3A CN111363402A (en) | 2020-04-09 | 2020-04-09 | Red special color ink for conch bead offset printing |
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| CN202010272753.3A CN111363402A (en) | 2020-04-09 | 2020-04-09 | Red special color ink for conch bead offset printing |
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Citations (5)
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|---|---|---|---|---|
| CN102690555A (en) * | 2012-06-28 | 2012-09-26 | 中国人民解放军信息工程大学 | Preparation method of spot-color ink map red for map printing |
| CN102799895A (en) * | 2012-06-26 | 2012-11-28 | 福建鸿博印刷股份有限公司 | Offset printing ink color matching method based on least square support vector machine |
| CN104371417A (en) * | 2013-08-10 | 2015-02-25 | 上海泉灵信息科技有限公司 | Four primary color ink for single paper high-speed printing |
| CN109294321A (en) * | 2018-12-18 | 2019-02-01 | 珠海市豪迈实业有限公司 | A kind of printing ink instead of tetra- color ink of CMYK |
| CN109294323A (en) * | 2018-10-19 | 2019-02-01 | 雅昌文化(集团)有限公司 | A kind of four-color wide-color-gamut offset ink for H-UV printing |
-
2020
- 2020-04-09 CN CN202010272753.3A patent/CN111363402A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102799895A (en) * | 2012-06-26 | 2012-11-28 | 福建鸿博印刷股份有限公司 | Offset printing ink color matching method based on least square support vector machine |
| CN102690555A (en) * | 2012-06-28 | 2012-09-26 | 中国人民解放军信息工程大学 | Preparation method of spot-color ink map red for map printing |
| CN104371417A (en) * | 2013-08-10 | 2015-02-25 | 上海泉灵信息科技有限公司 | Four primary color ink for single paper high-speed printing |
| CN109294323A (en) * | 2018-10-19 | 2019-02-01 | 雅昌文化(集团)有限公司 | A kind of four-color wide-color-gamut offset ink for H-UV printing |
| CN109294321A (en) * | 2018-12-18 | 2019-02-01 | 珠海市豪迈实业有限公司 | A kind of printing ink instead of tetra- color ink of CMYK |
Non-Patent Citations (1)
| Title |
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| 布莱恩•戈斯特: "《西方油画全技法—完成油画》", 30 November 2015, 广西美术出版社 * |
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Application publication date: 20200703 |