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1, overprint
In order to overlay the need for small lines, text can not use multi-color overprint, color pattern can not have a small anti-white, but should not be left in the color pattern, put other small text, Version of the black, blue, red, yellow version of the middle as far as possible not separated from other color version. For the sake of printing, the bar code should be arranged so that the direction of the line coincides with the circular direction of the tube. The color should ensure that the direction, if the conditions, then, large field background and the level of the best version of the plate version of the plate, large background as much as possible to use special edition. Hanging screen version must take full account of 80% and 5% of the two color jump area, gradient hanging network when the limit should be more than 10%. The same time as
2, ink color
The deployment of ink mainly includes two aspects: on the one hand refers to the adjustment of ink printing adaptability, such as ink viscosity, concentration, the principle is to adjust the viscosity of the ink with a diluent solvent adjustment, according to the printing before the roll and the machine to determine the situation Ink viscosity, in the printing process according to the volatile solvent often add solvent, try to ensure that the ink viscosity unchanged; ink to dilute, you must use dilution agent (ink). The same time as
Another aspect of ink dispensing is the deployment of ink colors. In this regard need to pay attention to the following: observe the color of the light source as far as possible the use of standard light source (D65), if there is no standard light source, the sun in the direction of the north window as well. Preparation of spot color, should use the original color ink for deployment, such ink ink brightness and saturation can be guaranteed. With as little as possible the number of ink color, color more, the greater the color matching error, the greater the difficulty of re-coloring. Proofing, a set of plates in the printing, you must confirm a standard proofs. Some manufacturers take the plate version of the draft as a standard sample, the final print delivery can not be the case, so before printing must use the printing machine proofing, confirmed by the customer or the relevant personnel as a standard. The same time as
3, proofing
Standard printing should be carried out under normal printing conditions, so the proof should be noted when the following: selected the most basic printing process conditions. Ink viscosity try to choose a little lower. Raw ink to be added, as far as possible has been used repeatedly has been contaminated ink for proofing. It is forbidden to do all non-canonical operations such as increasing the concentration and viscosity to increase the hue, adjust the pressure, and scraper to increase the transfer rate of the ink in order to overdo the effect. The ink must be stirred evenly before use, especially the spot color ink. Their own deployment of the spot color ink must be scraping accurate record retention, for future deployment for reference. Proofing as much as possible to achieve the normal printing speed. If the conditions permit, after confirming the basic color of the sample, first print a certain number of products, and then sampling confirmed as a standard, as a file to save the file. After confirming the standard, it should be cut 2 ~ 3mm as the equivalent standard, in the absence of heat, no place to save ultraviolet light, after each copy of the printing as a part of the use of printing.