Climate change ink is blocked?

Spring, the air humidity ratio is large, exposed to use because of the rapid evaporation of solvent ink, adhesives, often can produce shallow network blocking version, the phenomenon such as bleaching, printing ink, the ink absorption of excessive moisture, can make molecular structure reorganization, the result is usability, affinity, cause more knife line, and cause a tonal and composite color layers. In printing ink, adhesives after baking oven is extremely prone to false dry phenomenon, deep web dry more slowly, often stick guide roller and anti sticking phenomenon after winding. At this point, the printing house use less ink to add qijia, lest cycle time grew to make ink hygroscopic metamorphism. Drying medium ( Air) Amount of humidity for the residual solvent has a great influence, once the moisture in the air into the ink, will cause the comprehensive volatile solvent variation and inhibit the evaporation of the solvent. Double environment humidity, drying speed of ink generally delayed nearly two times, also for this reason, 'plum rains season' printed nylon membrane most likely to occur when the adhesion failure, so in the high temperature and high humidity environment, should try to slow down the printing speed, reduce the ink is exposed to air, to ensure that the ink can be fully dry. At the time of spring and summer, winter and spring season alternating temperatures, printing solvent formula must be change accordingly, in order to reduce ink blocking version of the phenomenon. In the general practice is to increase the solvent slowly dry ( Quick dry) The content of the solvent; Accordingly, the production process, speed, exhaust will adjust accordingly, ensure the production of volatile solvent fully, if the slow dry ink ( Quick dry) Inadequate solvent evaporation, can produce a series of consequences, such as ink adhesion of the glue after apparent adverse, composite, composite insufficient adhesive curing, etc. Will pay special attention to in the process of production with shallow network excessive area in printing design, because this area is most likely to occur 'edition' wall, special circumstances can also do in the pre-press plate-making process change, achieve the 'control in the first, prevention first'. The second is the ink viscosity control. The stability of the ink viscosity, relates to the stability of the printing color, so in the summer temperature, solvent evaporation speed faster, ink circulation system closed to the reduction of solvent evaporation, guarantee the stability of the ink viscosity is particularly important. （ Available in 3 # cup once every 30 min measurement) To distinguish real solvents and false and adjustment in the mixed solvent of printing ink to join, the links of some ink solvent soluble materials, called true solvent, the links of some ink solvent use single cannot dissolve, known as false solvents. Because between volatile solvent is different, if true solvent volatilization, first is the proportion of printing ink solvent is damaged will appear the phenomenon such as printing ink resin precipitation precipitation. So should be timely to add true solvent, when poor solvent balance, should add some true solvent evaporation rate slower, to keep the balance of the volatile solvent. Special use in the abolition of a stupid, xylene solvent such as benzene class, solvent type, in the traditional big four solvent type increased a lot of special solvents.