Food Boxes, how to improve printing accuracy by reducing the number of colors?

Food Boxes, how to improve printing accuracy by reducing the number of colors?

Food Boxes improves the accuracy of overprinting and reduces the number of printing colors, which will benefit the enterprise better. In order to reduce the number of colors and improve the accuracy of overprinting, higher requirements are also put forward for films, inks, and printing. This article will give a brief introduction to the specific situation.

　　 1. Choice of film

　　 For products that require high overprint accuracy, we must choose stable quality films. Use less or no films with no manufacturer and no production date, because these films can not guarantee the quality very well, and the uneven film will appear overlapping and offset during the printing process, which will cause the printed finished products to be blurred. .

　　2, printing equipment selection

　　In the choice of equipment, the machining accuracy of the machine is very important. Only the improvement of the machine precision can guarantee the accuracy of overprinting. During the printing process of the high-speed gravure printing machine, due to the acceleration of the printing speed and the stable tension, the overprint detection deviation is within ±0.01mm, and the ink transfer roller is used to transfer the ink printing. The transfer volume of the printing ink is full, and the shallow dots can also be very good. Transfer. Makes the printed pattern lifelike and can realize the complete reproduction of the design pattern.

　　3, printing plate roller accuracy requirements

　　The accuracy of the plate roller is directly related to the printing quality. During the processing of the plate roller, the concentricity, plate roller hardness and smoothness, and incremental amount should be ensured. Design quality is very important. In pattern design, printing design skills should be mastered. The pattern is partially reduced within 0.15mm, the increment of the plate roller is between 0.03mm and 0.06mm, and electronic color separation and electro-engraving.

However, due to market price competition in some domestic plate factories, the steel plate used for the plate roller is too thin, the chrome layer is thin, and some print the chrome layer once or twice. For high-speed printing, seamless tube plate making should be used to ensure concentricity and movement. balance.

　　4, ink selection

　　 Ink from some manufacturers with good quality and high reputation should be used. For products with high color registration accuracy, benzene-free and ketone-free inks will be well applied. When selecting ink manufacturers, 2-3 companies should be preferred, and the primary colors are basically the same, so that the color will remain the same when printing next time.

　　 5. Raise awareness and employee training

Using fewer colors to print exquisite patterns, the awareness of all employees and the training of employees are very important. Every operator is required to be serious and responsible for his work, participate in more skill operation training, and make preparations before starting the machine. , The printing mechanical properties, ink thinner ratio, ink viscosity, etc., should be continuously tested in production to avoid knife threads, dirt, ink spots, etc. during the printing process.

　　After each roll is printed, it should be compared with the printed seal sample, and adjusted to maintain the consistency of the color, constantly correct the deviation of the overprint accuracy, and truly strive for perfection.

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