A brief analysis of the characteristics of pre printing ink for corrugated boxes
in corrugated ink "> in the field of carton processing, using web pre printing technology to produce large quantities of products has become a trend. The benefits of pre printing ink technology are needless to say, but to truly popularize the application of pre printing technology, it is necessary to solve a series of problems, especially the need to develop ink suitable for pre printing and master the characteristics of pre printing ink.
compared with other ink varieties, pre printing sling tension testing machine (sling tension testing machine) It is divided into vertical cranes and then operated according to the speed requirements of current national standards and specifications for testing the mechanical properties of this material. The belt loading tension tester (vertical belt tension tester) and horizontal belt tension tester (horizontal belt tension tester) ink requirements have the following characteristics:
1 High temperature resistance
Web preprint processing technology is to first ink the face paper "> printing, in the pre printing press, the printing products are placed in front and received later. The printed products still remain in the form of rolls and will be used as the face paper for processing corrugated board. Then the printed products will be directly loaded into the corrugated paper production line and processed into corrugated board with lining paper and corrugated paper.
in the process of processing into corrugated board, the printing process is only one step in the process, and the printed products can only be regarded as semi-finished products, and the next process will be further carried out Processing. In the process of corrugated board production, in order to completely dry the adhesive in corrugated board, it must be dried at high temperature. At present, in order to update the original articles, the drying temperature of domestic tile wires is basically above 160 ℃, and the drying temperature of some high-speed tile wires even exceeds 200 ℃. In this process, it is required that the ink color of the pre printed pattern cannot change. Therefore, the preprint ink must have better high temperature resistance
2. Friction resistance
pre printing is just a processing process, and the printed products need to be covered with tile lines. During the secondary processing on the tile line, it is inevitable that the face paper will rub against the equipment, and the printed pattern must not be worn or even rubbed off. Therefore, preprint technology also puts forward new requirements for the friction resistance of ink
before mixing ink, the most important process is to analyze the original. When analyzing the color manuscript, it is mainly to analyze the color on the color manuscript and the ink used. The general principle that should be followed is: the three primary colors are the basic colors for allocating all ink colors. No matter how complex the color is, no matter how it changes, it can't exceed the range of the three primary colors. When analyzing the color manuscript, it is necessary to make clear whether the color manuscript is mainly printed by line or on-site. If line printing is the main method, we should focus on the consistency of the background color when allocating ink; If it is mainly based on field printing, the deployment can focus on the same complexion; If there is both, the sales volume in Dongguan market will reach 30million yuan when blending ink
after analyzing the color manuscript, analyze the color of the ink used, that is, for any kind of ink, be good at seeing the color components. For example: for yellow ink, we should be good at identifying whether it has red phase or blue phase (or green phase); For magenta ink, we should be good at identifying whether it is yellow or blue (or purple); For green ink, we should be good at identifying whether it is red or green (or yellow)
suppose green ink is mixed with green ink and yellow ink. If green ink has red phase, or yellow ink has red phase, the green obtained by mixing that line will not be dimmed, because this is actually equivalent to adding magenta ink to green ink and yellow ink, and even if this part of magenta is small, it should be mixed with a certain amount of cyan and yellow according to the principle of pigment subtraction method to form black (Yellow + cyan + magenta = black), and a small amount of black should be added to green, Of course, the color will be dimmed, and the lightness and saturation will be greatly reduced
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