2 spot color ink deployment method 1, proportion of ink color deployment, we must first carefully observe and analyze the ink samples or printed samples. Ink samples can be smeared on Dowling paper, and can also be printed on the IGT printability meter. In general, the four-step roller ink is 0.1m and the second roller ink is 0.15ml. First of all, we must observe and analyze which color inks the sample may consist of. We can use a graduated copper ink-absorbing tube to make coarse adjustments. Look at coarse ink samples (scrapers) and standards are not close, and record the ink ratio and ink volume. If it is close, convert the proportion into percentage, then use the analytical balance to fine-tune; if not, change the proportion of name-color ink and continue to deploy.
2, the reduction method has determined that the standard sample (customer-supplied standard color sample or ink sample that is not close to the standard sample) consists of several colors of ink, find out the contained ink, use sulfuric acid paper name 10g or 5g Glass plate, any transfer of ink used, when the ink is close to the standard sample, a little smear can be used to observe the face color, background color, scraping the ink used to recover. If you are close to a standard sample, weighing out the remaining amount of ink can be converted to the percentage content of the spot color ink. Then use the balance to fine-tune, if you follow near standards, continue to deploy.
3, PANTONE color method "PANNTONE Formula Guide" 2000 version of the Pantome color guide contains 1114 Pantom spot colors, is the world's universal color guide, it provides each color standard, has a number and transfer ratio, using Sector binding, color selection is quick and easy. For Pantome spot color inks, we must carefully observe and analyze the printed samples. Compare them with the color samples of Pantome's color matching guides to find the closest color samples. If they are close to each other, record the color numbers and compare the printed samples of the TCT ink color guide. , Analysis of the two color guide printed samples, whether the same; if there is an error to find out which error is caused by the proportion of ink. After the analysis, the proportion of the printing ink can be adjusted. This will make the deployment work easier.
3 spot color ink deployment of the deployment of spot color ink operation process. As shown in Figure 1 (slightly). Please pay attention to the following points when dispensing ink.
1) Take into account post-printing special: When selecting inks, consider post-press processing conditions. For example, if printing products need to be glazing, then general inks can be selected. If inks with good abrasion resistance are selected, not only the cost is high, but also the cost is high. Affect the glazing effect.
2) Mixing with the same kind: The mix of inks should try to master the same type of mix-mixing principle. For example, if there is no offset light and quick-drying ink when offsetting the mixed and complex colors, it can be replaced by offset resin ink, but the proportion should be taken into account. If the offset resin ink is too much, it will have an impact on the characteristics of the offset bright fast-drying ink, failing to improve the quality of the print. Ink color knowledge tells us that the more types of inks are mixed, the darker the colors. Therefore, no color ink can be used for primary color inks, and no color ink can be used for color inks.
3) determine the basic ink: the color of the sample needs more than two ink mix, to determine which color as the basic ink, gradually adding other ink; such as light ink as the basic ink, gradually adding dark ink. This will not be too much ink transfer.
4) The density of the printed samples is the same: when adjusting the colors according to the printed samples, the adjusted ink samples should adjust the amount of ink when printing, so that it is consistent with the density of the printed samples.
5) Note the recording and calculation: In particular, when adjusting the spot color ink according to the proportion method, it is necessary to record the added ink amount and the remaining ink amount at any time, which is favorable for calculating the final ratio.
6) Adjust ink properties: In the deployment of spot color inks, in addition to color matching, it is sometimes necessary to add a certain amount of additives to change the ink to meet customer needs.
7) Pay attention to the printing methods and characteristics: When deploying ink colors, you should consider the printing methods and characteristics, specify the printing method for which the oil is silently used, such as letterpress or offset printing, printing in the field or printing cable. Because the thickness of the ink layer formed by different printing methods is different, the color is also different. For example, for printing inks based on printing screens, you can focus on the same color when you match colors; if you are based on the field, you can focus on the same color when combining colors; if it is both, the background color and face color It must be balanced.
8) Paper consistency: The paper used for dispensing spot color ink should be consistent with the printing paper to avoid the color error caused by different paper.
9) The printing time is the same: When the customer provides the ink sample as the standard to match the spot color, the standard sample and the sample must be printed and compared at the same time, so as to accurately determine the color difference between them.
10) Weighing Accurately: After the color is allocated to find out the initial ratio, the balance must be fine-tuned so as to ensure the consistency of the sample of the minor (5g), the enlarged sample (100-2000g), and the color of the production sample. And pay attention to mixing evenly.
Spot color inks generally have high requirements on the accuracy of color. The quality of the color ink is not based on the approval of the deployment personnel. Instead, it is based on the degree of satisfaction of the customer after the print samples are printed in the printing factory.
In addition to the precautions described above, there are many special problems encountered in practical work. For example, when we allocated Shiseido spot color ink for Beijing Ribang Printing Factory, we adjusted it three times before and after. This spot-color ink is used to print Shiseido Cosmetic Bags, which are to be coated after printing. The first time the ink was transferred, the ink sample was wet, and the customer's sample was dry. At that time, the color was very close. After drying, there was a gap between the two samples. When the second ink was dispensed, the test was simulated in the laboratory. There is a gap between the film effect and the formal lamination in the printing factory, and it needs to be carried out. After the third adjustment, the manufacturer changed the original plan to use paper, resulting in errors in the ink and requiring readjustment.
In short, to master the deployment technology of spot color inks, it is necessary to accumulate more experience in practice.
2, the reduction method has determined that the standard sample (customer-supplied standard color sample or ink sample that is not close to the standard sample) consists of several colors of ink, find out the contained ink, use sulfuric acid paper name 10g or 5g Glass plate, any transfer of ink used, when the ink is close to the standard sample, a little smear can be used to observe the face color, background color, scraping the ink used to recover. If you are close to a standard sample, weighing out the remaining amount of ink can be converted to the percentage content of the spot color ink. Then use the balance to fine-tune, if you follow near standards, continue to deploy.
3, PANTONE color method "PANNTONE Formula Guide" 2000 version of the Pantome color guide contains 1114 Pantom spot colors, is the world's universal color guide, it provides each color standard, has a number and transfer ratio, using Sector binding, color selection is quick and easy. For Pantome spot color inks, we must carefully observe and analyze the printed samples. Compare them with the color samples of Pantome's color matching guides to find the closest color samples. If they are close to each other, record the color numbers and compare the printed samples of the TCT ink color guide. , Analysis of the two color guide printed samples, whether the same; if there is an error to find out which error is caused by the proportion of ink. After the analysis, the proportion of the printing ink can be adjusted. This will make the deployment work easier.
3 spot color ink deployment of the deployment of spot color ink operation process. As shown in Figure 1 (slightly). Please pay attention to the following points when dispensing ink.
1) Take into account post-printing special: When selecting inks, consider post-press processing conditions. For example, if printing products need to be glazing, then general inks can be selected. If inks with good abrasion resistance are selected, not only the cost is high, but also the cost is high. Affect the glazing effect.
2) Mixing with the same kind: The mix of inks should try to master the same type of mix-mixing principle. For example, if there is no offset light and quick-drying ink when offsetting the mixed and complex colors, it can be replaced by offset resin ink, but the proportion should be taken into account. If the offset resin ink is too much, it will have an impact on the characteristics of the offset bright fast-drying ink, failing to improve the quality of the print. Ink color knowledge tells us that the more types of inks are mixed, the darker the colors. Therefore, no color ink can be used for primary color inks, and no color ink can be used for color inks.
3) determine the basic ink: the color of the sample needs more than two ink mix, to determine which color as the basic ink, gradually adding other ink; such as light ink as the basic ink, gradually adding dark ink. This will not be too much ink transfer.
4) The density of the printed samples is the same: when adjusting the colors according to the printed samples, the adjusted ink samples should adjust the amount of ink when printing, so that it is consistent with the density of the printed samples.
5) Note the recording and calculation: In particular, when adjusting the spot color ink according to the proportion method, it is necessary to record the added ink amount and the remaining ink amount at any time, which is favorable for calculating the final ratio.
6) Adjust ink properties: In the deployment of spot color inks, in addition to color matching, it is sometimes necessary to add a certain amount of additives to change the ink to meet customer needs.
7) Pay attention to the printing methods and characteristics: When deploying ink colors, you should consider the printing methods and characteristics, specify the printing method for which the oil is silently used, such as letterpress or offset printing, printing in the field or printing cable. Because the thickness of the ink layer formed by different printing methods is different, the color is also different. For example, for printing inks based on printing screens, you can focus on the same color when you match colors; if you are based on the field, you can focus on the same color when combining colors; if it is both, the background color and face color It must be balanced.
8) Paper consistency: The paper used for dispensing spot color ink should be consistent with the printing paper to avoid the color error caused by different paper.
9) The printing time is the same: When the customer provides the ink sample as the standard to match the spot color, the standard sample and the sample must be printed and compared at the same time, so as to accurately determine the color difference between them.
10) Weighing Accurately: After the color is allocated to find out the initial ratio, the balance must be fine-tuned so as to ensure the consistency of the sample of the minor (5g), the enlarged sample (100-2000g), and the color of the production sample. And pay attention to mixing evenly.
Spot color inks generally have high requirements on the accuracy of color. The quality of the color ink is not based on the approval of the deployment personnel. Instead, it is based on the degree of satisfaction of the customer after the print samples are printed in the printing factory.
In addition to the precautions described above, there are many special problems encountered in practical work. For example, when we allocated Shiseido spot color ink for Beijing Ribang Printing Factory, we adjusted it three times before and after. This spot-color ink is used to print Shiseido Cosmetic Bags, which are to be coated after printing. The first time the ink was transferred, the ink sample was wet, and the customer's sample was dry. At that time, the color was very close. After drying, there was a gap between the two samples. When the second ink was dispensed, the test was simulated in the laboratory. There is a gap between the film effect and the formal lamination in the printing factory, and it needs to be carried out. After the third adjustment, the manufacturer changed the original plan to use paper, resulting in errors in the ink and requiring readjustment.
In short, to master the deployment technology of spot color inks, it is necessary to accumulate more experience in practice.
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