When meeting spot color printing and spot color printing, the technicians are occasionally asked to assign color inks according to what theories and methods are used to redistribute them. They all say "by experience." The mind is always thinking, how can this deployment be vague? Always have its basis. The author is engaged in color separation and plate making industry. I would like to briefly explain this article through this article.
Deployment Environment and Precautions We all know that when viewing a transmissive film or a light film, use a light box with a 5000-K color temperature. What happens when a reflective document is viewed? The same 5000K color temperature for viewing, but in fact, many colleagues will use 6500K color temperature as the inspection standard. However, the same ink will produce different color effects under different color temperature light sources. If the total color difference is greater than 2.0 de lta-E, the naked eye can already distinguish the difference.
Because the hue of the ink is formulated based on the principle of subtractive color, the equal amounts of the three primary inks form a blackish color. That is to say, the primary colors and blacks are mixed with each other to obtain the second color, or the second color is used for mutual deployment to obtain the third color, which is much darker than the primary colors. If the color is formulated with the minimum amount of ink, the vividness and lightness of the color are better because the grayscale is reduced and the lightness is high.
Inexperienced craftsmen often use more special colors to adjust inks, especially dark ink. Dark ink is more difficult to deploy with lighter inks. Before deployment, the proportion of the main color ink and the auxiliary color ink should be analyzed. The relationship between light and shade should be analyzed. Then the ink should be weighed. The main color ink should be the focus first, and then the auxiliary color ink should be slowly added. If the ratio of the main color ink and the auxiliary color ink is 9:1, and the auxiliary color ink is weighed first to 1.5, the main color ink is then magnified to 13.5. That is, it becomes 13.5:1.5 to get the correct color, and the amount of ink increases by 50%. When a small amount of ink is dispensed from a printing plant, two ink knives are used to mix and mix. After uniformly blending, a small amount of oil is used to dry the powdered paper strips with a paper strip and then the original color sample is used under the standard 5000K color temperature light source. Inspection, and the ink factory in the deployment of a large number of spot color ink, will use the mixer and three-roller with the stirring and grinding.
In addition to the hue of the formulated ink, the printability of the ink is equally important, such as adhesion, viscosity, and emulsification rate. The remaining spot ink after printing can still be prepared according to the hue of the new manuscript, but often the saturation is grayish, especially the remaining ink recovered from the ink fountain, when emulsification or printability has changed, it is better to Formulated with black ink or grey ink.
The amount of ink used for the calculation of the general amount can be based on the following factors: the number of printed sheets, the footprint of the imprint, the image or text, the thickness of the ink show, etc., should be proportional to the structure of the paper, the surface smoothness, the volume of the ink itself The proportion also affects its consumption of ink. For example, full black ink is printed on powdered paper, and 425,000 square inches of paper can be printed for each pound of ink, and the ink concentration is checked by a concentration meter to meet the standard. Or refer to the calculation method proposed by "Gao Ink Co., Ltd.". (printing)
Deployment Environment and Precautions We all know that when viewing a transmissive film or a light film, use a light box with a 5000-K color temperature. What happens when a reflective document is viewed? The same 5000K color temperature for viewing, but in fact, many colleagues will use 6500K color temperature as the inspection standard. However, the same ink will produce different color effects under different color temperature light sources. If the total color difference is greater than 2.0 de lta-E, the naked eye can already distinguish the difference.
Because the hue of the ink is formulated based on the principle of subtractive color, the equal amounts of the three primary inks form a blackish color. That is to say, the primary colors and blacks are mixed with each other to obtain the second color, or the second color is used for mutual deployment to obtain the third color, which is much darker than the primary colors. If the color is formulated with the minimum amount of ink, the vividness and lightness of the color are better because the grayscale is reduced and the lightness is high.
Inexperienced craftsmen often use more special colors to adjust inks, especially dark ink. Dark ink is more difficult to deploy with lighter inks. Before deployment, the proportion of the main color ink and the auxiliary color ink should be analyzed. The relationship between light and shade should be analyzed. Then the ink should be weighed. The main color ink should be the focus first, and then the auxiliary color ink should be slowly added. If the ratio of the main color ink and the auxiliary color ink is 9:1, and the auxiliary color ink is weighed first to 1.5, the main color ink is then magnified to 13.5. That is, it becomes 13.5:1.5 to get the correct color, and the amount of ink increases by 50%. When a small amount of ink is dispensed from a printing plant, two ink knives are used to mix and mix. After uniformly blending, a small amount of oil is used to dry the powdered paper strips with a paper strip and then the original color sample is used under the standard 5000K color temperature light source. Inspection, and the ink factory in the deployment of a large number of spot color ink, will use the mixer and three-roller with the stirring and grinding.
In addition to the hue of the formulated ink, the printability of the ink is equally important, such as adhesion, viscosity, and emulsification rate. The remaining spot ink after printing can still be prepared according to the hue of the new manuscript, but often the saturation is grayish, especially the remaining ink recovered from the ink fountain, when emulsification or printability has changed, it is better to Formulated with black ink or grey ink.
The amount of ink used for the calculation of the general amount can be based on the following factors: the number of printed sheets, the footprint of the imprint, the image or text, the thickness of the ink show, etc., should be proportional to the structure of the paper, the surface smoothness, the volume of the ink itself The proportion also affects its consumption of ink. For example, full black ink is printed on powdered paper, and 425,000 square inches of paper can be printed for each pound of ink, and the ink concentration is checked by a concentration meter to meet the standard. Or refer to the calculation method proposed by "Gao Ink Co., Ltd.". (printing)
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