The influence of temperature and humidity on the printing

Printing workshop temperature and humidity are the important factors that affect product quality. Temperature and humidity of workshop if not controlled, will seriously affect the print quality, and even can't production. General printing workshop temperature and humidity will be in the range of the following: temperature: 20 degrees Celsius; The relative humidity of 55% ~ 60%. Below will be taken from three aspects: the analysis of the effect of temperature and humidity on the printing process. 1. Environmental temperature and humidity paper: paper into the factory warehouse, storage time longer as far as possible, better place can be connected with a printing shop, the temperature control in 18 ~ 25 degrees Celsius, in 60 ~ 70% relative humidity control, make the paper library of temperature, humidity and print shop to achieve consistently, so to hold the paper moisture content changes. The paper moisture content changes, is a process of release of electrostatic. When the environmental temperature below 40 ℃, the flexible version of the change is not obvious; Temperatures above 50 ℃ flexible version of the volume expansion of 1% ~ 3%; The higher the temperature, the expansion of the version. Under the influence of temperature, its hardness and elasticity has obvious downward trend. 2. Embellish the temperature of the liquid: on the whole, education version liquid cooling for offset press cooling effect is not big. But keep the low temperature of the liquid in education version is helpful to reduce the evaporation in the alcohol in the mixing tank and water device, and can improve education version fluid viscosity. 3. The temperature of the ink: in the case of low temperature, the machine speed slow, often some of the ink in the ink fountain transport is not smooth, the ink supply normal phenomenon, cause the printing quality of the ink is more and more weak, influence the stability of the quality of the printing ink, this is the main performance of the ink thixotropy is poor. High temperature cracking molecular bonds, coating is easy embrittlement, coating is can't afford to machining and high-temperature cooking and paint; Chemicals in the low temperature, resin molecular bonds not abundant crosslinking curing film, not only without adhesion, also will form the opposite of smearing.