Deployment of the most popular iron printing ink

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The blending of iron printing ink in the color light additive method, the equal proportion of the three color lights can be added and mixed to form white light. Blue and green light mixed into blue light; Blue and red light mixed with finished red light; Green and red light mixed into yellow light and so on. These phenomena are not easy for most people to accept, because people's extensive practice is subtraction - the addition of colored bodies, such as drawing color pictures, painting color matching, etc., all belong to the principle of subtraction. For an ink blending operator, it is not only necessary to understand the principle of color light addition, but more importantly, how to use the principle of subtraction to guide the actual operation. In actual printing, spot color is sometimes used as a foil according to the original design needs. In addition, some products printed with four-color primary ink are difficult to achieve ideal reproduction effect due to overprint problems and difficult control of water ink balance. Sometimes they also need spot color printing. Especially in packaging printing, some products pursue individuality, so they choose more spot color printing

before mixing ink, carefully analyze the color draft or sample draft.

when analyzing the color draft, it is mainly to analyze the color on the color draft, the ink used, and bacodin. Its basic principle is that the three primary colors of pigments are the basic colors for the deployment of all ink colors, and they can never change without their roots. At the same time, it is necessary to make clear as far as possible whether the color draft is mainly printed by line or on-site. If line printing is the main method, we should focus on the same background color when allocating ink. If field printing is the main method, we can focus on the face color when allocating ink. If both are used, we should give consideration to both the background color and the face color when allocating ink

after the analysis of the color manuscript, the color of the ink used should be analyzed. Generally speaking, the ink blending operator is particularly sensitive to the observation of the ink color, and can see the components, such as yellow ink. It should be good at identifying whether it is yellow, red or blue (or green). For magenta ink, it should be good at identifying whether it is red or blue (or purple). For green ink, Be good at distinguishing whether it is red or green (or yellow). If green ink is mixed with green ink with red phase and yellow ink with red phase, the mixed green will be dark, because this is actually equivalent to adding magenta ink (Yellow + Green + magenta = black) to green ink and yellow ink. Therefore, the observation of ink color is a necessary basic skill for ink blending operators

II. Basic principles for the allocation of spot color inks

whether dark or light spot color inks, the allocation should follow the basic principles, which are based on Printing chromatics and printing technology. The main contents include the following ten points:

(1) try to use the same type of ink and auxiliary materials. In addition, if you can mix two primary color inks, do not use three primary color inks. In the same way, if you need some kind of intercolor matching, you must also use the intercolor primary ink to avoid reducing the brightness of the ink and affecting the color and brightness. When mixing dark ink, the main color ink shall be put into the mixing tray according to the weight of the ink, and then the auxiliary color and necessary auxiliary materials shall be gradually added

(2) where diluent is the main ingredient and primary or dark ink is the auxiliary ingredient, the blended ink is collectively referred to as light ink. In terms of the deployment method of light ink, it is necessary to select the connected COM port to directly online. There is a slight difference between the online and dark ink. It is to gradually add dark ink to the light ink. Do not take the dark ink first and then add the light ink, because the tinting power of the light ink is poor. If the method of adding the light ink to the dark ink is not easy to adjust the hue, it will often make the oil ink of various materials more toned

(3) prepare small color samples before preparing spot color ink. This means to preliminarily judge the ink color to be used according to the hue of the original, then weigh a small amount of ink from each color of ink in proportion with a balance, accurately weigh it, put it on the ink mixing table for adjustment, drag the small color sample with the original sample with the ink suitability instrument, and make relevant records and keep it properly

(4) when preparing multicolor spot color ink, the complementary color theory is used to correct the color deviation. For example, when purple is too heavy in a multicolor ink, yellow ink can be added to correct it; If red is too heavy, green ink (such as peacock blue or sky blue ink) can be added to correct it; For another example, when the black ink is yellow and the blackness is not enough, a small amount of light emitting blue can be added as the color enhancement material, because light emitting blue is a blue ink with red light, which is conducive to improving the blackness of black ink

(5) master the hue characteristics of common inks. In the actual operation process, we must master the hue characteristics of common inks. For example, in the deployment of light lake green ink, sky blue or Malachite blue should be used, and dark blue should not be used, because the dark blue ink has a red flavor, and the color will be dark but not bright after adding it. Similarly, the dark yellow ink that is red should not be used, but the light yellow ink that is blue has a better effect. For example, the golden red ink should be used as much as possible in the deployment of orange ink, because the color phase of the golden red ink is red and yellow, It can increase the brightness of the ink

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(6) pay attention to the proportion of different inks. Generally speaking, the proportion of inks is different. Inks with similar proportion are easy to mix, while inks with too large proportion difference will cause printing problems. For example, the green ink mixed with lead chrome yellow ink and Malachite blue ink with a large proportion will float up after a long time, and those with a large proportion will sink, so there is a "floating color" problem. If we use yellow ink made of organic pigments to mix, our disease will be eliminated. In addition, due to the large proportion of white ink, in addition to covering requirements and adding a small amount of color when necessary, white ink should not be diluted as far as possible to prevent poor color overlap, fading and other quality problems

(7) baikeding used for mixing spot color ink shall be consistent with baikeding used for printing to avoid color difference caused by different hues of baikeding

(8) pay attention to the consistency with the printing sample density when preparing spot color ink. Generally, when the newly adjusted new ink is close to the color of the printing sample provided by the customer, the color will change after the new ink is dried, so the newly adjusted new ink cannot be lighter than the printing sample in color. That is, the principle of "dark light printing"

(9) taking into account the characteristics of post press processing. When selecting the ink, the post press processing shall be considered. If the print requires welds (such as spray cans), the non fading ink shall be selected on the edge of the welds In the preparation work before iron printing, whether it is a multi-color machine or a monochrome machine, ink color allocation is a work with high technical content. Iron printing ink is a special kind of ink. If you want to meet the conditions of metal printing and high-temperature baking, you must give comprehensive consideration to the selection of pigments and binders. If the operator does not understand the performance and color matching knowledge of iron printing ink, the bright ink will not achieve the expected appearance effect and due quality level

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