How can we guarantee the same color when printing the same product?

Carton users want the color of their own product packaging to remain consistent for a long time, so as not to make customers have doubts about their own product quality and storage time, which naturally will require the carton printer to maintain the same color requirements. In fact, the carton printing factory has attached great importance to the color of this technical standard, in addition to the printing operator to check whether the control color is in line with the standard, but also a full-time inspector for each batch of inspection color. However, there will still be a chromatic aberration in the carton of the same type. People in the industry all know that the quality of cartonboard, the quality of printers, the inks and their deployment experience are all important factors that determine the color quality of cartons. The three factors are mutually reinforcing. Here, I only talk about ink deployment and color detection for your reference.

First of all, when purchasing ink, we must pay attention to whether this ink factory has actual technical strength and whether there is a quality control management system. Their sources of raw materials, especially the source of pigments, are stable. If you randomly change the pigment manufacturers, even if the same type of ink is produced, the hue will have a slight color difference, which will affect the color matching of the printing factory. In addition, whether the tinting strength index of the ink can be controlled between 95-105% (the color concentration of the ink Indicators) This also affects the color shades of the inks, and whether they use pigments that are light-fast, alkaline, and water-resistant; viscosity, and water-solubility, etc., must be carefully examined before purchasing. If the amount of red ink or yellow ink is relatively small during color matching, although the color is already in compliance with the standard, the product also obtains the customer's consent, but it will fade after a long time. If it is compared with the next batch, there will be a difference in color. This is because the selected red ink or yellow ink is not light-fast enough, and it is gradually discolored due to poor alkali resistance, which requires the attention of the ink dispenser.

In addition to ink and customer satisfaction, ink samples must be retained. Some carton factories only match the colors on the carton when matching colors. This is unscientific because changes in carton storage, the thickness of the coating, and the angle of the light source all affect the judgment of the viewer. A reasonable test should be the selection of the boxboard paper to be printed, cut into scraping paper, and use a small roller or wire rod to scrape the standard ink and the new ink at the same time on a single sample paper, due to the same Paper, the same thickness (here to pay attention to the same sample and standard viscosity must be the same), the same light source, the ink is very easy to judge the two colors of hue, luster, etc., experienced ink match error is sometimes less than 0.3 NBS The unit (color difference unit of the National Bureau of Standards) is also more accurate than the value detected by the instrument.

Specific detection methods, please find the ink inspection technology, standard color inspection methods. (The above was provided by the technical department of Jinan Modern Ink Co., Ltd. Please correct the misunderstanding.)