CN113002204B - Printing method for improving ink color uniformity - Google Patents
Printing method for improving ink color uniformity Download PDFInfo
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- CN113002204B CN113002204B CN202110178039.2A CN202110178039A CN113002204B CN 113002204 B CN113002204 B CN 113002204B CN 202110178039 A CN202110178039 A CN 202110178039A CN 113002204 B CN113002204 B CN 113002204B
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- 238000007639 printing Methods 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 55
- 239000000976 ink Substances 0.000 claims description 81
- 238000005520 cutting process Methods 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000049 pigment Substances 0.000 abstract 1
- 238000007650 screen-printing Methods 0.000 abstract 1
- 239000003086 colorant Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
- B41F19/008—Apparatus or machines for carrying out printing operations combined with other operations with means for stamping or cutting out
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
Description
技术领域technical field
本发明涉及印刷领域，尤其涉及一种用于提高油墨色彩均匀性的印刷方法。The invention relates to the field of printing, in particular to a printing method for improving ink color uniformity.
背景技术Background technique
在传统的印刷中，通常利用分色软件对原稿进行分色，制作青色、品红色、黄色和黑色网版；在印刷时添加对应的油墨，依次使印刷纸被每个网版压印，得到符合原稿色彩的印刷品。而对于某些色彩，如浅色和紫色系，由于网点数较少，在印刷时容易丢失色彩，使得色彩偏离，产生色差。一般的解决办法就是将这些色彩作为专色，单独成一版来印刷；而客户的原稿多数为合成的带有特效阴影的图片，不便于直接通过软件分色分层，软件专色分色容易使每种颜色的网点产生干涉，需要后期大量时间调整。In traditional printing, color separation software is usually used to separate the color of the original manuscript to make cyan, magenta, yellow and black screens; when printing, add the corresponding ink, and the printing paper is embossed by each screen in turn to obtain A print that matches the color of the original. For some colors, such as light colors and purple series, due to the small number of dots, it is easy to lose color during printing, which makes the color deviate and cause color difference. The general solution is to use these colors as spot colors and print them in a separate plate; however, most of the customer's originals are synthesized pictures with special effects and shadows, which is not convenient to directly use software color separation and layering. Software spot color separation is easy to use The screen dots of each color interfere and require a lot of time to adjust in the later stage.
发明内容Contents of the invention
本发明所要解决的技术问题是：提供一种操作简单、能够保证色彩均匀一致的用于提高油墨色彩均匀性的印刷方法。The technical problem to be solved by the present invention is to provide a printing method for improving ink color uniformity which is easy to operate and can ensure uniform color.
为了解决上述技术问题，本发明采用的技术方案为：一种提高油墨色彩均匀性的印刷方法，包括步骤：In order to solve the above technical problems, the technical solution adopted in the present invention is: a printing method for improving ink color uniformity, comprising steps:
A、采用分色软件将原稿进行通道分色，得到黑色分色文件；A. Use the color separation software to separate the channel color of the original, and get the black color separation file;
B、对原稿上的容易产生色差部分进行标记处理，得到色差区域，并将色差区域转换成专色分色文件；B. Mark the part of the original that is prone to color difference, get the color difference area, and convert the color difference area into a spot color separation file;
C、在原稿上删减色差区域并继续采用分色软件对原稿剩余部分进行通道分色，得到青色、品红色和黄色分色文件；C. Delete the color difference area on the original and continue to use color separation software to perform channel color separation on the remaining part of the original to obtain cyan, magenta and yellow color separation files;
D、分别对以上所得到的黑色、专色、青色、品红色和黄色分色文件通过制版设备制作对应的网版；D. Make the corresponding screen version through the plate making equipment for the black, spot color, cyan, magenta and yellow color separation files obtained above;
E、针对色差区域调制特定的专属油墨；E. Modulate specific exclusive ink for the color difference area;
F、将各个网版分别安装在印刷辊上并向颜料箱添加对应的油墨进行印刷。F. Install each screen on the printing roller and add corresponding ink to the paint box for printing.
本发明的有益效果在于：首先对原稿进行分色得到黑色分色文件，黑色分色文件作为原稿的特效色，体现在原稿的特效阴影等；对容易产生色差部分进行标记处理为色差区域，单独将色差区域转换成专色分色文件，此过程不通过软件分色，避免了软件分色导致的颜色网点的干涉；在删去色差区域的基础上继续对原稿分色，制作多种颜色的网版和油墨；在打印时，黑色、青色、品红色和黄色的普通色彩能够互相配合对应原稿上的各种颜色和特效，而浅色和紫色系通过专色准确表达，无需后期对颜色网点干涉的调整。The beneficial effects of the present invention are as follows: first, the original is color-separated to obtain a black color-separation file, and the black color-separation file is used as the special-effect color of the original, which is reflected in the special-effect shadow of the original; Convert the color difference area into a spot color separation file. This process does not go through software color separation, which avoids the interference of color dots caused by software color separation; continue to separate the original color on the basis of deleting the color difference area, and make multiple colors. Screen and ink; when printing, the common colors of black, cyan, magenta, and yellow can match each other to correspond to various colors and special effects on the original, while light colors and purple are accurately expressed through spot colors, without the need for post-processing of color dots Interference adjustments.
具体实施方式Detailed ways
为详细说明本发明的技术内容、所实现目的及效果，以下结合实施方式予以说明。In order to describe the technical content, achieved objectives and effects of the present invention in detail, the following descriptions will be made in conjunction with the embodiments.
一种提高油墨色彩均匀性的印刷方法，包括步骤：A printing method for improving ink color uniformity, comprising the steps of:
A、采用分色软件将原稿进行通道分色，得到黑色分色文件；A. Use the color separation software to separate the channel color of the original, and get the black color separation file;
B、对原稿上的容易产生色差部分进行标记处理，得到色差区域，并将色差区域转换成专色分色文件；B. Mark the part of the original that is prone to color difference, get the color difference area, and convert the color difference area into a spot color separation file;
C、在原稿上删减色差区域并继续采用分色软件对原稿剩余部分进行通道分色，得到青色、品红色和黄色分色文件；C. Delete the color difference area on the original and continue to use color separation software to perform channel color separation on the remaining part of the original to obtain cyan, magenta and yellow color separation files;
D、分别对以上所得到的黑色、专色、青色、品红色和黄色分色文件通过制版设备制作对应的网版；D. Make the corresponding screen version through the plate making equipment for the black, spot color, cyan, magenta and yellow color separation files obtained above;
E、针对色差区域调制特定的专属油墨；E. Modulate specific exclusive ink for the color difference area;
F、将各个网版分别安装在印刷辊上并向颜料箱添加对应的油墨进行印刷。F. Install each screen on the printing roller and add corresponding ink to the paint box for printing.
从上述描述可知，本发明的有益效果在于：首先对原稿进行分色得到黑色分色文件，黑色分色文件作为原稿的特效色，体现在原稿的特效阴影等；对容易产生色差部分进行标记处理为色差区域，单独将色差区域转换成专色分色文件，此过程不通过软件分色，避免了软件分色导致的颜色网点的干涉；在删去色差区域的基础上继续对原稿分色，制作多种颜色的网版和油墨；在打印时，黑色、青色、品红色和黄色的普通色彩能够互相配合对应原稿上的各种颜色和特效，而浅色和紫色系通过专色准确表达，无需后期对颜色网点干涉的调整。As can be seen from the above description, the beneficial effects of the present invention are: first, the original is color-separated to obtain a black color-separation file, and the black color-separation file is used as the special effect color of the original, which is reflected in the special effect shadow of the original; and the parts that are prone to color difference are marked. For the color difference area, the color difference area is converted into a spot color separation file separately. This process does not go through software color separation, avoiding the interference of color dots caused by software color separation; continue to color the original on the basis of deleting the color difference area, Make multi-color screens and inks; when printing, the common colors of black, cyan, magenta and yellow can match each other to correspond to various colors and special effects on the original, while light colors and purple are accurately expressed through spot colors, There is no need to adjust the interference of color dots in the later stage.
进一步地，所述B步骤中的“对原稿上的容易产生色差部分进行标记处理，得到色差区域，并将色差区域转换成专色分色文件”的具体操作为：Further, in the step B, the specific operation of "marking the parts prone to color difference on the original manuscript to obtain the color difference area, and converting the color difference area into a spot color separation file" is as follows:
将分离黑色后的原稿上的色差部分通过对色差区域的轮廓进行勾勒，得到色差区域的形状；对色差区域进行颜色的填充覆盖；根据填充的颜色对其进行分离并转换成专色分色文件。Outline the outline of the color difference area on the color difference part of the separated black original to obtain the shape of the color difference area; fill and cover the color difference area; separate it according to the filled color and convert it into a spot color separation file .
由上述描述可知，通过对色差区域的轮廓进行勾勒得到色差区域的准确形状，再利用颜色填充使其独立于其他颜色，方便对色差区域的选定和转换。From the above description, it can be seen that the accurate shape of the color difference area is obtained by outlining the outline of the color difference area, and then filled with color to make it independent of other colors, which facilitates the selection and conversion of the color difference area.
进一步地，所述填充的颜色为能够明显与色差区域四周区分的颜色。Further, the filling color is a color that can be clearly distinguished from surrounding areas of the color difference area.
由上述描述可知，填充的颜色易于区分，便于操作者选定。It can be known from the above description that the filled colors are easy to distinguish and convenient for the operator to select.
进一步地，在所述A步骤之后还包括以下步骤：Further, after the step A, the following steps are also included:
将A步骤中分离出黑色的原稿进行复制，得到复制稿；Copy the black original manuscript separated in step A to obtain a copied manuscript;
在所述B步骤之后还包括以下步骤：After the B step, the following steps are also included:
将B步骤中得到的专色分色文件打开并将其色差区域与复制稿的色差区域进行重合，检查是否对色差区域外的图像产生干涉并进一步调整色差区域轮廓。Open the spot color separation file obtained in step B and overlap its color difference area with the color difference area of the copy, check whether there is interference with the image outside the color difference area and further adjust the color difference area outline.
由上述描述可知，通过与复制稿的重合对比，对具有误差的轮廓进行修正，保证后续的打印质量。It can be seen from the above description that by comparing with the copied draft, the outline with errors is corrected to ensure the subsequent printing quality.
进一步地，所述E步骤中的“针对色差区域调制特定的专属油墨”具体操作为：将原稿所对应的样品上色差区域的颜色通过爱色丽分光密度仪对其色度进行检测并根据得到的色度数值与青色、品红色和黄色油墨的墨量进行匹配，并将上述油墨进行混合，得到专属油墨。Further, the specific operation of "modulating a specific exclusive ink for the color difference area" in the E step is: the color of the color difference area on the sample corresponding to the original is detected by the X-Rite spectrodensitometer for its chromaticity and according to the obtained Match the chromaticity value with the ink volume of cyan, magenta and yellow inks, and mix the above inks to obtain exclusive inks.
由上述描述可知，专属油墨的制作通过爱色丽分光密度仪测色，将得到的色度数值与各色油墨匹配，混合调制得到。From the above description, it can be known that the production of exclusive ink is obtained by measuring color with X-Rite spectrodensitometer, matching the obtained chromaticity value with various inks, and mixing and preparing.
进一步地，所述专属油墨内还添加有一定比例的去粘油、燥油、白色墨和金银墨。Further, a certain proportion of detackifying oil, dry oil, white ink and gold and silver ink is added to the exclusive ink.
由上述描述可知，专属油墨中添加的去粘油、燥油，使得专属油墨能够快速附着印刷纸，并快速干燥，而白色墨和金银墨的加入能使其更准确地表达所需的颜色。As can be seen from the above description, the detackifying oil and dry oil added in the exclusive ink enable the exclusive ink to quickly adhere to the printing paper and dry quickly, while the addition of white ink and gold and silver ink can make it express the required color more accurately .
进一步地，在所述A步骤之前还包括以下步骤：Further, the following steps are also included before the A step:
在切纸前，定时对切纸用的切割刀进行磨刀工序；Before cutting paper, regularly sharpen the cutting knife used for paper cutting;
在切割刀的刀刃上涂抹一层较薄的油脂；Apply a thin layer of grease to the cutting edge of the cutting knife;
通过研磨锋利的切割刀对印刷纸的大小进行切割，以适应原稿大小；Cut the printed paper to fit the original size by grinding a sharp cutting knife;
将切割好的印刷纸进行去纸粉和去静电处理并堆叠于印刷机进纸口，通过上纸设备输入至印刷机内。The cut printing paper is processed to remove paper powder and static electricity, and stacked at the paper inlet of the printing machine, and input into the printing machine through the paper loading device.
由上述描述可知，对切割刀进行磨刀工序能够避免在切纸时产生纸粉，影响油墨在印刷纸纸面的附着；刀刃上的油膜能够附着在印刷纸的切割边缘，使得纸粉牢牢被吸附，不会四处飘扬；切割准确大小的印刷纸，在经由去纸粉和去静电处理送入印刷机内，其中再次的去纸粉处理，减少纸粉对油墨附着的干扰，特别是针对切割好但放置时间过长以及搬运过程中沾染纸粉等微小异物的情况，而去静电处理，保证印刷纸能够准确地一张一张输入而不会多纸同时输入。From the above description, it can be known that the sharpening process of the cutting knife can avoid the generation of paper powder when cutting paper, which will affect the adhesion of ink on the printing paper surface; the oil film on the blade can adhere to the cutting edge of the printing paper, making the paper powder firmly It is adsorbed and will not fly around; cut printing paper of accurate size, and send it into the printing machine after removing paper powder and static electricity treatment, and the paper powder removal treatment again reduces the interference of paper powder on ink adhesion, especially for If the cutting is done but the storage time is too long, and tiny foreign matter such as paper powder is contaminated during the handling process, the static electricity treatment is required to ensure that the printed paper can be accurately input one by one without multiple paper input at the same time.
进一步地，所述去纸粉和去静电处理的具体操作为：Further, the specific operations of the paper powder removal and static removal treatment are:
在堆叠好的印刷纸的切割边缘涂油；在印刷纸的上方设置朝向纸面吹气的鼓风装置，所述鼓风装置在印刷机进纸时对印刷纸的纸面吹气；在印刷机的进纸口设置棉毛刷，所述棉毛刷封闭一侧进纸口并与印刷纸纸面相抵。Apply oil to the cut edge of the stacked printing paper; above the printing paper, set a blower device that blows air towards the paper surface, and the blower device blows air on the paper surface of the printing paper when the printing machine feeds the paper; The paper inlet of the machine is provided with a cotton brush, and the cotton brush closes the paper inlet on one side and is offset against the printing paper surface.
由上述描述可知，在堆叠好的印刷纸的切割边缘涂油在吸附纸粉的同时防止印刷纸摩擦产生静电；设置朝向印刷纸纸面吹气的鼓风装置用于清除印刷纸纸面上的纸粉，而棉毛刷起到吸附纸粉，清理印刷纸纸面的同时也起到整平印刷纸的作用。From the above description, it can be seen that oiling the cut edge of the stacked printing paper can absorb paper powder and prevent static electricity from printing paper friction; set up a blower device that blows air towards the printing paper surface to remove the dust on the printing paper surface. Paper powder, while the cotton brush can absorb paper powder, clean the printing paper surface and also play a role in leveling the printing paper.
进一步地，各个网版的安装依照一定顺序，所述顺序具体为将青色、品红色、黄色、专色和黑色网版依次放进印刷机的各组印刷辊；印刷顺序为青色、品红色、黄色、专色和黑色。Further, each screen plate is installed in a certain order, and the order is specifically to put cyan, magenta, yellow, spot color and black screen plates into each group of printing rollers of the printing machine in sequence; the printing sequence is cyan, magenta, Yellow, spot color and black.
由上述描述可知，通过由浅到深的顺序印刷，避免了颜色之间的干涉。It can be known from the above description that by printing in order from light to dark, the interference between colors is avoided.
进一步地，在所述F步骤中还包括以下步骤：Further, the F step also includes the following steps:
在各组印刷辊上设置测试网版，每个所述测试网版上均设置有油墨测色区域，所述测试网版油墨测色区域的长度方向具有渐变的厚度，每个所述测试网版的油墨测试区域均互相间隔，所述测试网版在印刷网版安装时与印刷网版相连接，共同印刷一张印刷纸纸面；A test screen is set on each group of printing rollers, each of the test screens is provided with an ink color measurement area, and the length direction of the test screen ink color measurement area has a gradual thickness, and each of the test screens The ink test areas of the plate are all spaced apart from each other, and the test screen is connected with the printing screen when the printing screen is installed, and a piece of printing paper is printed together;
在印刷过程中，分别将每组印刷网版所印制的印刷纸抽取并对其油墨测色区域进行色度检测；将得到的色度检测结果与原稿的各色色度值进行比较，若两者的色差值在允许范围内，则表示合格；若两者色差值超出允许范围，则需要进行调整；观察不同厚度的测试网版油墨测色区域的印刷情况，判断油墨厚度是否合格。During the printing process, the printing paper printed by each group of printing screens is extracted and the chromaticity detection is performed on the ink color measurement area; the obtained chromaticity detection results are compared with the chromaticity values of each color of the original, If the color difference value of the two is within the allowable range, it means qualified; if the color difference value of the two exceeds the allowable range, it needs to be adjusted; observe the printing situation of the test screen ink color measurement area of different thicknesses, and judge whether the ink thickness is qualified.
由上述描述可知，通过设置测试网版，使得在印刷过程中，使用者可以抽取每组印刷网版所印制的印刷纸，针对经过不同印刷网版的油墨测色区域进行色度检测；具有渐变厚度的测试网版能够同时测试油墨的厚度，油墨厚度过大则体现在测试网版较薄处被印刷在印刷纸上；依据以上检测结果来调整印刷机的各项操作数值，如印刷压力、进纸速度等。It can be seen from the above description that by setting the test screen, the user can extract the printing paper printed by each group of printing screens during the printing process, and perform chromaticity detection for the ink color measurement area that has passed through different printing screens; The test screen with gradual thickness can test the thickness of the ink at the same time. If the ink thickness is too large, it is reflected in the thinner part of the test screen and is printed on the printing paper; adjust the operating values of the printing machine according to the above test results, such as printing pressure. , paper feed speed, etc.
本发明的实施例一为：Embodiment one of the present invention is:
本实施例的一种提高油墨色彩均匀性的印刷方法，包括步骤：A kind of printing method that improves ink color uniformity of the present embodiment, comprises steps:
印刷前的切纸准备。Paper cutting preparation before printing.
在切纸前，定时对切纸用的切割刀进行磨刀工序；Before cutting paper, regularly sharpen the cutting knife used for paper cutting;
接着在切割刀的刀刃上涂抹一层较薄的油脂；Then apply a thin layer of grease to the cutting edge of the cutting knife;
通过研磨锋利的切割刀对印刷纸的大小进行切割，以适应原稿大小；Cut the printed paper to fit the original size by grinding a sharp cutting knife;
将切割好的印刷纸进行去纸粉和去静电处理并堆叠于印刷机进纸口，通过上纸设备输入至印刷机内。其中去纸粉和去静电处理的具体操作为：在堆叠好的印刷纸的切割边缘涂油；在印刷纸的上方设置朝向纸面吹气的鼓风装置，所述鼓风装置在印刷机进纸时对印刷纸的纸面吹气；在印刷机的进纸口设置棉毛刷，所述棉毛刷封闭一侧进纸口并与印刷纸纸面相抵。The cut printing paper is processed to remove paper powder and static electricity, and stacked at the paper inlet of the printing machine, and input into the printing machine through the paper loading device. Wherein the specific operation of removing paper powder and destaticizing treatment is: oiling the cutting edges of the stacked printing paper; Blow air on the paper surface of the printing paper when printing paper; set a cotton brush at the paper inlet of the printing machine, and the cotton brush closes the paper inlet on one side and is offset against the paper surface of the printing paper.
原稿的分色和印刷。Color separation and printing of originals.
采用分色软件将原稿进行通道分色，得到黑色分色文件；Use the color separation software to separate the channel color of the original, and get the black color separation file;
将分离出黑色的原稿进行复制，得到复制稿。The original document from which the black color was separated is copied to obtain a copy.
对原稿上的容易产生色差部分进行标记处理，得到色差区域，并将色差区域转换成专色分色文件。具体操作为：将分离黑色后的原稿上的色差部分通过对色差区域的轮廓进行勾勒，得到色差区域的形状；对色差区域进行颜色的填充覆盖；根据填充的颜色对其进行分离并转换成专色分色文件。其中所述填充的颜色为能够明显与色差区域四周区分的颜色。Mark the parts that are prone to color difference on the original to obtain the color difference area, and convert the color difference area into a spot color separation file. The specific operation is as follows: the color difference part on the original manuscript after the black separation is outlined by the outline of the color difference area to obtain the shape of the color difference area; fill and cover the color difference area; separate it according to the filled color and convert it into a special Color separation files. Wherein the filled color is a color that can be clearly distinguished from surrounding areas of the color difference area.
将得到的专色分色文件打开并将其色差区域与复制稿的色差区域进行重合，检查是否对色差区域外的图像产生干涉并进一步调整色差区域轮廓。Open the obtained spot color separation file and overlap its color difference area with the color difference area of the copy, check whether there is interference with the image outside the color difference area and further adjust the color difference area outline.
在原稿上删减色差区域并继续采用分色软件对原稿剩余部分进行通道分色，得到青色、品红色和黄色分色文件。Delete the color difference area on the original and continue to use color separation software to perform channel color separation on the remaining part of the original to obtain cyan, magenta and yellow color separation files.
分别对以上所得到的黑色、专色、青色、品红色和黄色分色文件通过制版设备制作对应的网版。For the black, spot color, cyan, magenta and yellow color separation files obtained above, make corresponding screen plates through the plate making equipment.
针对色差区域调制特定的专属油墨。具体操作为：将原稿所对应的样品上色差区域的颜色通过爱色丽分光密度仪对其色度进行检测并根据得到的色度数值与青色、品红色和黄色油墨的墨量进行匹配，并将上述油墨进行混合，得到专属油墨。所述专属油墨内还添加有一定比例的去粘油、燥油、白色墨和金银墨。Formulate specific proprietary inks for areas of color difference. The specific operation is: the color of the color difference area on the sample corresponding to the original is detected by the X-Rite spectrodensitometer for its chromaticity, and the obtained chromaticity value is matched with the ink volume of cyan, magenta and yellow inks, and Mix the above inks to obtain exclusive inks. A certain proportion of detackifying oil, drying oil, white ink and gold and silver ink is also added to the exclusive ink.
在各组印刷辊上设置测试网版，每个所述测试网版上均设置有油墨测色区域，所述测试网版油墨测色区域的长度方向具有渐变的厚度，每个所述测试网版的油墨测试区域均互相间隔，所述测试网版在印刷网版安装时与印刷网版相连接，共同印刷一张印刷纸纸面；A test screen is set on each group of printing rollers, each of the test screens is provided with an ink color measurement area, and the length direction of the test screen ink color measurement area has a gradual thickness, and each of the test screens The ink test areas of the plate are all spaced apart from each other, and the test screen is connected with the printing screen when the printing screen is installed, and a piece of printing paper is printed together;
将各个网版分别安装在印刷辊上并向颜料箱添加对应的油墨进行印刷。各个网版的安装依照一定顺序，所述顺序具体为将青色、品红色、黄色、专色和黑色网版依次放进印刷机的各组印刷辊；印刷顺序为青色、品红色、黄色、专色和黑色；Install each screen on the printing roller and add corresponding ink to the paint box for printing. The installation of each screen is in a certain order, and the order is specifically to put the cyan, magenta, yellow, spot color and black screens into each group of printing rollers of the printing machine in turn; the printing sequence is cyan, magenta, yellow, special color and black;
在印刷过程中，分别将每组印刷网版所印制的印刷纸抽取并对其油墨测色区域进行色度检测；将得到的色度检测结果与原稿的各色色度值进行比较，若两者的色差值在允许范围内，则表示合格；若两者色差值超出允许范围，则需要进行调整；观察不同厚度的测试网版油墨测色区域的印刷情况，判断油墨厚度是否合格。During the printing process, the printing paper printed by each group of printing screens is extracted and the chromaticity detection is performed on the ink color measurement area; the obtained chromaticity detection results are compared with the chromaticity values of each color of the original, If the color difference value of the two is within the allowable range, it means qualified; if the color difference value of the two exceeds the allowable range, it needs to be adjusted; observe the printing situation of the test screen ink color measurement area of different thicknesses, and judge whether the ink thickness is qualified.
综上所述，本发明提供的一种提高油墨色彩均匀性的印刷方法，首先对原稿进行分色得到黑色分色文件，黑色分色文件作为原稿的特效色，体现在原稿的特效阴影等；对容易产生色差部分进行标记处理为色差区域，单独将色差区域转换成专色分色文件，此过程不通过软件分色，避免了软件分色导致的颜色网点的干涉；在删去色差区域的基础上继续对原稿分色，制作多种颜色的网版和油墨；在打印时，黑色、青色、品红色和黄色的普通色彩能够互相配合对应原稿上的各种颜色和特效，而浅色和紫色系通过专色准确表达，无需后期对颜色网点干涉的调整；进行多次的去纸粉处理和去静电处理保证印刷时油墨的附着；设置检测色差区域轮廓的步骤，保证色差区域的分离不会对其他颜色产生干涉；设置印刷过程的检测步骤，依据检测结果来调整印刷油墨的色度和厚度，保证印刷品的出厂质量。In summary, the present invention provides a printing method for improving ink color uniformity. First, the original is color-separated to obtain a black color separation file, and the black color separation file is used as the special effect color of the original manuscript, which is reflected in the special effect shadow of the original manuscript, etc.; Mark the part prone to color difference as a color difference area, and convert the color difference area into a spot color separation file separately. This process does not pass through software color separation, avoiding the interference of color dots caused by software color separation; when deleting the color difference area Continue to color-separate the original, and make multi-color screens and inks; when printing, the common colors of black, cyan, magenta and yellow can match each other to correspond to various colors and special effects on the original, while light and The purple color is accurately expressed through the spot color, and there is no need to adjust the interference of the color dots in the later stage; multiple times of paper powder removal treatment and anti-static treatment are carried out to ensure the adhesion of ink during printing; the steps of detecting the outline of the color difference area are set to ensure that the separation of the color difference area is not accurate. It will interfere with other colors; set the detection steps of the printing process, adjust the chroma and thickness of the printing ink according to the detection results, and ensure the quality of the printed matter.
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书内容所作的等同变换，或直接或间接运用在相关的技术领域，均同理包括在本发明的专利保护范围内。The above descriptions are only examples of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent transformations made using the content of the description of the present invention, or directly or indirectly used in related technical fields, are equally included in the scope of the present invention. within the scope of patent protection.
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