Guangdong Huaping Hygiene Material Industrial Co.,Ltd. main products include printing film,PE breathable film,PE perforated film,Multicolor printed film,Nonwoven Laminated film,Anti-counterfeiting Holographic film etc .
Plastic film gravure printing is a common printing method. Because of good color reproducibility, realism, strong three-dimensional effect, easy to carry and beautiful finished bags, it is widely used in various flexible packaging, such as food packaging, pharmaceutical packaging and other fields. In the printing process, regardless of the printing method, whether it is multi-color or single-color printing, the first problem encountered before printing is the deployment of ink colors. No matter how bright the ink is, if the operator does not know some ink performance and color matching knowledge, the mixed ink cannot achieve a satisfactory appearance and quality level. The deployment of ink color is a crucial part. Some large-scale enterprises also have specialized blenders. I have been engaged in the flexible packaging industry for many years, and now I have compiled the relevant opinions on the color matching process into a document, hoping to be helpful to my peers.
1 color matching principle
Any color is represented by three characteristics: hue, lightness and saturation. The above three characteristics must be considered in the color matching process. In the process of ink color matching, the ink type should be selected according to the actual printing process, ink layer thickness, printing substrate and other conditions. At the same time, the gloss, hue, coloring power and hiding power of the ink should be considered.
① Gloss. Gloss can be measured by instruments or judged by naked eyes. Often during the color matching process, observations are made with the naked eye only. For special cases, it must be measured with instruments, such as chromatographs and so on. Gloss is actually the ability of the ink printed sample to reflect light in the same direction after being irradiated by light. It directly affects the appearance of printing and is a very important indicator. At the same time, when choosing ink, it is necessary to distinguish whether the ink itself is bright, semi-gloss or matte ink, and whether the same type of ink is used should also be considered. If the printing ink is inner printing (chlorinated polypropylene resin type) or surface printing (polyamide resin) ink, it must be prepared for the same ink to avoid mixing errors and unnecessary losses.
② Hue. It is the basic feature of color and is used for qualitative distinction. When color matching, the first thing to consider is whether the hue is consistent, and the detection method is usually to observe and compare by scraping samples.
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