The allocation of ink is one of the important links in the process of printing machine
The distribution of ink is one of the important links in the printing process. The quality of ink distribution directly affects the quality of printed products. The following is a little experience of the printing factory on the ink, and I hope to comment with us.
First, when mixing ink, it is necessary to pay attention to: hue, lightness and chroma.
First of all, we should carefully analyze the primary color draft, analyze the primary color draft according to the principle of the three primary colors of ink, and determine the color of the main ink and the color of the auxiliary ink. In theory, according to the principle of three primary colors, any complex color can be assigned. However, in the internship, it is still not possible to assign the color requested by the customer with the single use of the three primary colors. Therefore, it is necessary to choose dark yellow, medium yellow, light yellow, dark blue, medium blue, light blue, light blue, light blue, light blue, light blue, deep red, red, orange, light red, green ink and other more than ten kinds of ink talent to meet the application of the request.
Secondly, after the hue is adjusted, when the brightness is allocated, generally we will encounter two situations: the brightness is too strong and the brightness is lacking. The brightness is too strong, and the strong color material that can participate in the appropriate hue may be readily involved in black or white to reduce the brightness. The lack of brightness, you can participate in some white ink may be suitable for the light color ink to enhance its brightness. For example, we feel that the yellow light is too strong, in order to reduce the brightness, we can participate in a little purple. After all, adjust the color of the oil color, when the color is too strong or too pure, you can participate in gray or black ink, perhaps participate in complementary color ink, if the color is too gray, then you should participate in pure strong color ink.
Second, when matching ink, we should also consider what type of printer to use in the printing process.
The function of each printer is not the same, so the questions to pay attention to when matching ink are not the same. For example, when matching ink for an offset press, you should pay attention to the color of the ink when extending the sample to be darker than the original color. Because there is no printing pressure when the sample is extended, its ink layer is always stronger than the knot. When printing, the pressure of the rubber on the paper is very large, the ink layer is strong and uniform, and the amount of ink is less than that of the expansion. The ink layer is thin, the color is poor.
Third, we should also understand the varieties of paper when matching ink.
The use of loose texture, rough appearance of paper, capillary adsorption force, can increase the ink absorption ability, in the ink should pay attention to increase the amount of ink. The use of smooth and strong paper such as coated paper, the amount of ink is less. Should be careful to reduce the amount of ink, to prevent the composition of waste.
Fourth, we should also consider the question of the size of the printer pressure.
The pressure of the printer is large, which can make the imprinting ink layer strong and uniform, and the printing plate has no flower phenomenon. The machine pressure is small, the layout force is lack, so that the imprinting ink layer is not strong, resulting in plate attack, and can only choose to increase the amount of ink to change the printing plate hair. This shows that the same plate and paper, the amount of ink required for printing on a machine with low pressure is more than that for printing on a machine with high pressure. Therefore, the printing plate with large layout pressure is generally printed on the circular flattening machine, which is not only beneficial to the quality of the improved product, but also to save ink.
