The content of two-piece can color printing generally includes: patterns, trademarks, colors, "QS" logo, legal provisions, precautions, copyright, capacity marking, ingredients, nutrition labeling, barcodes, promotional text, bottling plant information, etc. The quality of can printing will directly affect the sales of the bottling plant and the market choice of consumers. For this reason, the bottling plant has always paid great attention to and strictly controlled the printing quality of two-piece cans.
At present, the speed of domestic two-piece can production lines can reach 2300CPM. Ensuring that the color printing of two-piece cans with high-speed color printing meets customer standards is not only a major difficulty in the production of cans, but also one of the key points of printing quality control.
Bottling plants need to continue to innovate and launch new layout designs that attract consumers' attention. At the same time, they must also take into account the printing process characteristics of two-piece can plants. Every new version printing is a new challenge for the production and quality control of two-piece can plants.
Two-Pieces Cans of color printing are different from the three cans of the flat version printed process. Two-pieces cans of printing are characterized by printing patterns on the molding cans, which uses typical curved surface printing methods, namely convex glue printing. The process is: the ink is first transmitted from the ink roller to the printing version engraved with the pattern, and then the print is printed to the glue version of the rubber version of the wheel. Finally, the color pattern above it is transferred to the surface of the tank. After printing, a layer of colorless transparent optical oil is used as a protective layer. The transfer process of ink involves "ink grooves -ink rollers (used to accurately transmit ink and regulate the fluidity and transmission of ink) -the printing version (with graphic parts and non -graphic parts, ink in the raised place) - glue Board (rubber cloth, a special formula for rubber) -s (the surface of the cleaning treatment, used for receiving images) ".
Factors affecting the quality of the two-pieces cans include: temperature/humidity, transmission pressure, printing speed, ink viscosity, color order (from shallow to deep), type of tank, type of ink, etc.
The main flaws of two-pieces cans of printing include: ink pollution, leakage (large area, small area), color differences (obvious, mild), incomplete optical oil (large area, small area), ink pollution in the can, the text is unclear clearly , Printing ghost shadows, barcodes are not readable (barcode pollution, tiles), no production date code, poor matching, and scratching.
For the two-pieces cans of printing standards, the production and quality personnel of tank factories can only meet the customer's needs for printing only if they fully recognize them and perform the standards without discounting. In the GB/T 9106.1-2009 "Packaging Container Aluminum Easy Opening Cover Aluminum Two-Pieces Cans", the quality requirements of the aluminum can body have been explained. In terms of tank defect content (category C is not qualified), it refers to the slight difference in coloring, coloring, and light painting, and slight differences between the color of the coloring and the color of the color.
