With the continuous development of commodity economy, paper containers with color corrugated cartons and cartons as product packaging have been adopted by more and more merchants, and the quality of postpress processing has also been valued by people. Because the quality of the post-press processing of color boxes and color boxes affects not only the effect of product packaging, but also determines the market image of the products. Therefore, the emphasis is placed on the technical control of the post-press processing quality of color boxes and color boxes. It is of great significance to improve the packaging performance of products, effectively protect products and promote the sales of products. 1 Do a good job of technical control of film quality Lamination is a common process for improving the performance and decorative effects of colored cartons, cartons, and how film quality directly affects the performance and image of product packaging. Therefore, no matter from the point of view of the decoration or protection of the product packaging, the film and paper are firmly bonded, the surface is clean, smooth, and smooth; there is no wrinkle, no blistering, and no chalk marks; the degree of dryness after coating is appropriate. Sticking to the surface film or paper surface is the basic requirement for quality control of the film. In addition to paying attention to the control of pressure, temperature, speed and coating amount of glue in the laminating process, it is also necessary to pay attention to the technical control of the source of quality, that is, to pay attention to the control of the paper and printing quality, that is, to control the moisture of the paper. With the printing environment to achieve a better balance of conditions to ensure the paper surface flatness and prevent the paper after the film deformation and other undesirable conditions. At the same time, to control the thickness of the printing ink layer and the dryness of the ink layer, any printing product that cannot be powdered must be as dust-free as possible, and the powder that is required to be powdered should be printed with as thin and uniform dusting as possible. The ink used in the film-covered prints is best not to add auxiliary materials, which is also the basis for ensuring the quality of the film. In addition to controlling the production process technology, inspection and control should be performed during the lamination process. When testing, it is advisable to take a suitable area of ​​the film proofs and rub it with both hands several times to see if there is any peeling or blistering between the plastic film and the print sheet. The quality is more reliable. It can also be tested by tear-off method. That is, the plastic film layer on the film proof sheet is peeled off by hand and peeled off to see whether the printing ink layer or paper fiber is attached to the film layer in a large area, and if so, the process is explained. Control is normal. Through sampling inspection, the generation of non-conforming products can be avoided, and the product quality and production efficiency can be increased synchronously. 2 Do a good job of technical control of glazing quality Now most of the preprinted cartons and color box products are used to improve the surface gloss of products and improve the quality of the products. After the printing, the glazing process is often used to achieve the surface effects of the finished products and the protection products. In order to ensure the quality of glazing, we must pay attention to the technical control of the production process. First of all, when choosing the varnishes, it should be noted that they are compatible with the characteristics of the printed matter. For the color box color box products with large print area and large amount of ink, the amount of powder to be sprayed is larger. Strong covering oil can better avoid variegation after glazing. Secondly, the choice of glazing oil must be based on the production characteristics of the equipment, otherwise it will directly affect the quality of the product and production efficiency. For example, the solvent-based coating oil is only suitable for production on the ordinary coating machine, and the UV-curing coating coating must be used on a coating machine equipped with an ultraviolet drying device, so that the coating film can be cured and dried. . Water-based or alcohol-soluble varnish, the drying length of the coating machine should be more than 6m, the temperature of the drying tunnel must be above 60°C, so that the glazing of the product can meet the drying requirements, and the printing product can be prevented from stacking. Adhesion occurs during the process. The shortening of the drying path and the faster speed of the glazing machine require that the curing and drying speed of the glazing oil be correspondingly faster, so as to prevent the problem of adhesion quality in the glazing process. Third, when using varnishes, be careful to mix evenly, because the molecular weight of each material component in varnishes is different, and precipitation phenomenon occurs easily. Precipitated varnish will inevitably affect the quality of the product's varnish. Therefore, in the production process, it is necessary to pay attention to mixing the varnish often to improve the quality of the varnish. Fourth, when using the same or different types of manufacturers of the same type of Varnish, we must first carry out small batches of test production, and then according to the quality of products and the results of experience, to determine a more scientific and reasonable deployment program to prevent the product The occurrence of light quality problems ensures the stability of the batch product quality. In addition, the purchase of glazing oil should pay attention to the shelf life, general shelf life of glazing oil is 6 to 9 months, if glazing oil has passed the shelf life, are prone to deterioration, affect the normal use and the quality of the coating, so When using, it should be noted that the advanced coating oil must be used first, and pay attention to the identification and production records, to prevent the maturing oil from going bad. 3 Do a good job of technical control of calendering quality The calendering is based on the application of a layer of polishing oil on the basis of the product, the use of calender temperature and pressure, change the surface state of the coating after drying to achieve a high gloss mirror finish. The product's uniform and high-gloss quality depends on the concentration of the polishing oil, the thickness of the coating layer, the calendering temperature, the pressure, and the machine's production speed. If the concentration of the polishing oil is low or the coating layer is thin, during the calendering process, it is easy for the tissue and the steel strip to be stuck together. Therefore, in addition to referring to the manufacturer's recommended formula, the most important thing is to properly determine the appropriate ratio according to the characteristics of your own production equipment and the characteristics of printed materials. For the coating thickness of the polishing oil, the apparent gloss of the surface after the application of the product is obviously improved. The control in this respect usually also depends on the operator's production experience and technical proficiency. If the condition of the factory, the gloss meter can be used for inspection and control, the reliability of quality control is more accurate. The calendering temperature is generally controlled at about 100°C, the pressure is controlled between 90KN/m and 110KN/m, and the speed of the machine is about 8m/min. However, in the actual production operation, we must pay attention to the integration of various production conditions, according to the characteristics of the printed product, the characteristics of the raw paper materials, the temperature and humidity of the production environment, summed up the different production conditions, the use of different pressure temperature technology, In order to better avoid the calender tape sticky paper failure. For example, in the past, the author found that in the production process quality tracking, when the pressure of 250 g/m2 pre-printed face paper products is set at a temperature of 130° C., it is possible to better avoid the failure of the calendered adhesive-bonded tissue paper, and the calendering The quality effect is also more stable. 4 Technical control of hot stamping quality Process practice shows that printing quality is the source of hot stamping quality. To control the quality of hot stamping, we must first control the printing quality. For the process of stamping a layer of electro-aluminum on the ink of ink, the thickness, adhesion and drying performance of the ink layer directly affect the quality of the stamping. In the past, the author found that the actual printing production process, when printing the background ink, if the amount of desiccant is too much, it is easy to make the printed product ink layer crystallization phenomenon, resulting in aluminum foil hot stamping hair and even not hot stamping. In addition, when adding ink, if you add an excessive amount of bright paste, release agent, varnish, dry oil, anti-sticking agent, etc., and printing ink coating amount is too much, it will easily lead to hot stamping or pull off the bottom Ink layer phenomenon. Therefore, hot stamping products should pay attention to the control of the ink dispensing process and the inking operation technology, and do not use or minimize the use of auxiliary materials, and try to use the fast fixing, quick-drying, and high-quality inks suitable for hot stamping. Control the thickness of the appropriate printing ink layer. In the control of the hot stamping process technology, it is necessary to pay attention to moderate pressure in order to avoid adverse situations such as stencils, burrs, strong bulges, weak adhesion of the ink layer, or the occurrence of stencils or inaccuracies in the hot stamping layout. In the hot stamping temperature control, we must pay attention to the larger hot stamping area, the relatively higher temperature control; the other hand, the electric temperature is lower, the specific situation should be based on the actual temperature of the plate and aluminum foil can withstand the temperature And set. If the hot stamping is performed at an excessively high temperature, the hot-melt film layer is liable to be melted in an over-range manner to cause stencil printing, and problems such as fog-like shape, poor lightness, blistering, and oxidative discoloration on the surface of the dyed layer are likely to occur. Due to the different characteristics of anodized aluminum materials and hot stamping materials, the required temperature for hot stamping is also significantly different. Some can be hot stamped at a temperature of about 80°C, while others can be hot stamped at 180°C or even 200°C. However, in any case, the temperature of the hot stamping is to melt the adhesive layer of the aluminum foil so as to complete the complete and even transfer of the aluminum foil film layer. After the best stamping temperature is determined, hot stamping should be performed continuously in the production process to avoid the phenomenon of shutdown, in order to maintain the constant temperature and machine speed, and ensure the stability of the stamping quality.