What is the testing standard for the moisture content of printed paper? Usually, the technician only looks at the surface, but does not seriously use the purpose of measuring the moisture content of the paper is to control the humidification effect of the paper to guide production. But we also know that even if the wet content of the paper is measured, it is not known whether the paper has reached balance. Because, the balance content of a certain paper in the temperature and humidity environment of the printing shop is unknown. This is also a thorny problem, how to solve this problem?
It is very important to measure the moisture content of paper accurately. And what is the moisture content? The moisture content of paper refers to the moisture weight of a certain weight of paper and its total weight ratio, expressed as a percentage. There are several measurement methods, direct methods are drying method, distillation method and chemical method, specific can refer to GB/T462-2003 method. From professional knowledge of physical chemistry, a certain moisture content of the material in its surroundings have a with the corresponding saturated steam layer, called the relative balance of saturated steam humidity humidity (relativeequilibriumhumidity), referred to as RER. Were That is to say, the relative equilibrium humidity of the paper is measured, and the value is compared with the humidity of the ambient air, and it is known whether the paper is balanced with the ambient temperature and humidity.
