In order to ensure that the color differences of the products of the same batch and different batches of the packaging box meet the national standards and customer requirements, the spot colors are controlled together during the box printing process.
1. Production According to the color code sample provided by the customer, the color card provides the proportion of the spot color ink through the computer color matching system, then calls out the ink sample, and uses the ink homogenizer and the ink spreader to ‘display’ the color samples of different densities. Then according to the country The standard (or customer) requires the range of color difference, use a spectrophotometer to determine the standard, light limit and depth limit, and make a printing standard color card (if the color difference exceeds the standard, further correction is required). Half of the color card for packaging design is China Cake Box Packaging manufacturers ordinary color samples. The other half is the color sample after surface treatment, which is convenient for quality inspection.
2. Verify the spot color. Considering that the paper of the box is the main factor affecting the color difference. So before each printing, use the actual printing paper to ‘display’ the color sample, and do the color card Minimal correction to eliminate the influence of paper.
3. When printing control packaging printing, the collar machine controls the thickness of the spot color ink layer by printing a standard color card. The design of advertising posters helps to measure the main density value and Bk of the color with a densitometer. In order to overcome the difference in color density between dry and wet inks.
In short, in the packaging box printing process, the reasons for the color difference of the spot colors are various forms, and there is no specific analysis for the different reasons in actual production. Solve these problems. Try to control the risk of deviation within a relatively small range, and design and produce outdoor event advertising products to provide customers with satisfactory packaging printed matter.
Main business: packaging boxes, food packaging boxes, paper bowls, salad bowls, fast food Boxes and so on.
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