Research on Color Management of Plastic Flexible Packaging Printing
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First, the importance of color management
Color is a feeling that occupies 90% of the visual appearance, and consumers use color as a major factor in purchasing a particular product. Color in the circulation of the market, an increase of 80% of brand recognition. As the internationalization of world-renowned brands has been gradually strengthened, which has influenced and inspired local packaging design and packaging and printing services, compared with packaging design, localized demand for packaging printing has become stronger. Many of our domestic large and medium-sized packaging and printing companies have a considerable business ratio derived from these global brands.
Due to the unification of brand image, brand owners increasingly focus on the management of visual identity systems such as brand identity colors. This also gave birth to a new service industry: color management services. Global brand owners have started to hire professional color management service companies to provide color management services for their brands globally. Based on the brand owner's requirements for the management of the supply chain and the control of color, correct color reproduction is one of the most important and most important contents of the printing of plastic flexible packaging. PantoneLIVE, a standard platform for color management and communication based on cloud computing, has considered different substrates and printing methods to overcome color differences caused by different supply chains and different processes, and achieved color consistency from design to printing. This platform greatly reduces the cost of brand color communication across the globe and is the tool for the entire brand and packaging printing supply chain.
Second, the definition of plastic flexible packaging printing and market demand
In the general terminology of national packaging (GB4122-83), a flexible package is defined as a flexible package that refers to a package whose shape may change after the contents are filled or removed. All kinds of bags, boxes, sleeves, and envelopes made of paper, aluminum foil, fibers, plastic films, and their composites are all flexible packaging. The importance of plastic film-based flexible packaging printing. Plastic flexible packaging printing refers to special printing with plastic film or plastic products as printing materials. It is named after the substrate. It is a printing method that involves a wide range of processes and has a special style. Printed materials range from films and composites for flexible packaging to all types of paper (wine labels, tipping paper, decorative paper, cigarette packets, carton printing, etc.). The plastic film or plastic product used for plastic packaging printing contains polar genes in its molecular structure, has good chemical stability, can resist the corrosion of most acids and alkalis, and is insoluble in common solvents at room temperature. Due to the addition of antioxidants, stabilizers, and other additives during the plastics production process, the affinity between the plastic and the ink is poor, and the ink is not easy to dry after printing. Therefore, the plastic substrate must be processed before printing so that it can be well-kept with ink. And, the ink can be well absorbed during printing, the ink layer is not separated from the substrate after printing.
In recent years, as the production of food, beverages, dairy products, cosmetics, detergents, beer, and condiments has grown, the need for more flexible packaging of plastics and plastic composites has grown. From the emphasis on pursuing development speed to taking the cycle economy and green packaging development centered on improving quality, creating brands, and saving energy and reducing consumption, the flexible packaging printing industry has developed rapidly.
Third, the characteristics of plastic printing color management
Color deviations between printed images and samples and color changes in the printing process are one of the most common manifestations of print quality defects. How to truly evaluate colors objectively, objectively measured variables and appropriate measurement methods are very necessary. Due to the unique media and printing process, the color management of plastic printing is different from the commonly used substrate-paper printing method, which is mainly reflected in the following aspects.
1. Dot gain characteristics: Plastic printing is different from offset printing, and the ink layer thickness of offset printing is difficult to control. The size of the dot can be controlled within the specified range by the pre-press dot compensation curve, so the consistency of offset color in the field is poor, and the reproducibility of the dot area is better, and the plastic flexible packaging printing is softer due to the printing plate material. , Dots increase and their severity under printing pressure. Small changes in printing pressure can cause significant changes in the entire printed image; when the density of the ink in the field increases, the dot gain increases, which has a great influence on the tone in the image.