The new proofing and packet six problems in the process of printing

Enterprise ordering bags in the new proofing and printing process often encounter some problems, professional manufacturer of flexible packaging packaging in this for the new proofing and reflect the common problems in the printing process made a summary, hoping to help demand order packaging enterprises. 1, plate by not in conformity with the original this is we don't want to see, is bad to plate making factory, printing factory and customer, but also there is no best, only the rework. Therefore, under the plate making factory plate order, must be clear file size and text content based on what the final result, especially when customers supply of materials is large, such as both the CD, and color, may photocopy, facsimile, etc. , at the moment will strictly check whether all kinds of material content, together with and without contradiction, and timely communication with customers, not take it for granted. 2, hue deviation because of the application of digital proofing system, usually play in front of the plate making digital plate-making factory for printing and customer for confirmation, and the effect of the digital proof is close to the practice of intaglio printing effect. So, need to packaging factory printing process control is stable, not too big fluctuations, should not be too obvious hue deviation. This is not a problem for some of the biggest packaging manufacturer, and some small packaging factory could have done better in this respect, may often encounter this kind of problem. 3, page easy with dirty, this has something to do with the quality of the chromium plating layer, in general, the chromium plating layer shall be made to achieve a certain degree of light and density requirements, generally require chrome layer appearance of grain handling in 400 & ndash; Article 600 a/cm2, within the scope of this section is not easy to dirty. But even dense chromium layer in particular, if is coarser, not light, also easy to dirty. Printing process control may constitute improper layout with dirty, can adjust the printing pressure, printing ink viscosity inspection and solvent ratio, replacement ink, adjust the scraping blade and other methods to solve them. Line 4, the knife from the plate-making perspective analysis, there are two causes of cutter line, one is have scratches on the surface of the copper plating, chromium layer hardness is low or rough appearance. From the printing process control point of view, perhaps including: there are foreign bodies in the ink, cut the page; The scraping blade sharpness peace straight degree is poorer; Improper scraping blade Angle and pressure. 5, plate printing endurance low from the perspective of plate making factory, this is mainly related to the hardness of chromium plating layer, in general, the chromium layer hardness shall be manipulated in HV900 & ndash; Between 1000, chromium layer hardness is low, the use of natural impact plate become old, yea, but high chromium layer hardness, chromium layer to produce corresponding internal stress is big, a brief burst ( Also known as & other; Critical edition & throughout; ) , will also affect the plate printing endurance. Plate printing endurance is low, of course, also may be associated with the packing factory of printing process, such as printing pressure is too large, improper scraping blade Angle and pressure, ink a foreign body in the improper use or operator, etc. 6, misregister from version drum into consideration, basically has the following reasons: there is something wrong with the version of the drum diameter; Version of the dynamic balance can not meet the requirements of roller, appear larger beating in the printing process. Considered from the aspects of printing, the main reasons are: material expansion deformation; Oven temperature Settings. Tension control improper or volatility, etc.