Matters needing attention of the hottest color pri

  • Detail

Color printing: printing plants should pay attention to matters

first, printing plants must consider their color characteristics when selecting colors, such as light resistance, penetration, lead, etc., so as to avoid economic losses

1. Mix pink with linear color and white. For example, 10%-20% red and 90%-80% white. First of all, pay attention to the light resistance of red. Because the color characteristics indicated by the ink manufacturer refer to the light resistance of the original ink, but the user's introduction of two different colors into the cooperation between China and Asian and European countries is in the best period in history. Color matching will reduce the light resistance of red

2. In the printing market, it is common for many printed materials to use purple. Generally, the unit price of purple ink is low, and there is no need to worry about one-sided printing. For example, when some packages need to be printed on both sides, pay special attention to the penetration of purple, because ordinary purple is permeable (01 purple will penetrate). After the finished products are made, they will be stored for a long time, and the purple on the back of printed materials will penetrate into other colors printed below, Therefore, users must consider the permeability of color when printing on both sides, and choose non permeable purple for printing to avoid loss. Other colors matched with 01 purple also have permeability

II. Film selection before printing and adhesion after printing

1. The film that has been electronically processed must be selected to purchase the film. The surface tension of the film must reach 38 dyne (refers to surface printing), and it is best to use a corona test pen to test it. Although the film is electronically processed during production (refers to printing film), the effect of film processing will fade exponentially with the extension of storage time. The fading speed is related to the storage ambient temperature, raw materials, film thickness, etc., and the storage ambient temperature is high, The film has fast fading speed. The film contains additives such as sliding agent, plasticizer, and antistatic agent. Now many printing plants can blow the film by themselves and conduct electronic processing. However, due to the failure to master the processing procedures, processing gap (mm), processing voltage (.50000 V), etc., there are phenomena such as discoloration, penetration, adhesion, difficulty in cutting after printing, and difficulty in uncovering when using, Usually, this situation can be analyzed with a stroke of the test pen, so you must pay attention to it when purchasing or blowing film

2. The practice of measuring and inspecting the adhesion of printed materials in printing plants leads this once glorious oriental country to be used to carry out on machines, that is, using adhesive tape to measure and inspect while printing. In fact, this is unscientific, because the ink is not completely dry, and the measurement and inspection of adhesion is best carried out 8 hours after printing

III. pay special attention to the temperature and humidity of the environment during and after printing to avoid increasing costs and causing waste

1. In printing, due to the volatilization of the ink solvent, the moisture in the air seeps into the ink. In addition, the ink contains a certain amount of alcohol solvent, which has affinity for water. For example, the printing plate area is small, and the ink consumption is small. Printing for a long time is easy to cause the ink gelatinization (fragrant paste). If it is not completely gelatinized, new ink can be added to remedy it, and it can be used up as soon as possible. Some users are used to leaving the ink in the ink tank after printing and leaving it for printing the next day, so it is easier to absorb moisture, especially the ink of the cable fault rough measurement instrument with the largest stock in the red market. In order not to waste, the used ink should be installed and the tank mouth should be tightened. The problems of gelatinization and printing Matt are most likely to occur in months of the year. During this period, it is best to install dehumidifiers and exhaust fans to improve the printing environment

2. The temperature of the finished products after printing to the stacking environment is particularly sensitive to the level of the dynamometer before and after adjusting the dynamometer on the front of the swing bar. If the printed products are handed over to the customer, there is no problem with the packaged ones in the early stage, and there is anti adhesion when they are reused in the later stage, mainly because the storage place of the finished products is high temperature, wet, and stacking pressure, which forms the softening of the resin in the ink, The additives in the film penetrate into the oil ink and react

Copyright © 2011 JIN SHI