Thermal transfer, water transfer, offset longitudinal comparison

Thermal transfer, water transfer, and offset printing have brought new vitality to the market. Let's take a look at offset printing. Offset printing is based on the principle of incompatibility between water and ink. Water is too small to form. The increase of the density in the field will increase or distort the area of ​​the phototexture dots. In severe cases, it will produce stencils, and some of them will become dirty easily. This will make the imprinting layer ambiguous and form waste products.

Excessive moisture, under the effect of mechanical pressure, can easily cause ink emulsification, reduce cohesion and water resistance. The greater the moisture, the longer the time, emulsification is more severe, and the level of destruction of ink printability is also more severe. As a result, the ink accumulates on the ink roller and the printing plate and cannot be conveyed normally, forcing the printing job to be affixed, so that the water roller has to be rewashed, and the new ink is changed. Due to the ink emulsification, the formation of ink color fades, the sharp drop in saturation and viscosity, and the weakening of the adhesion force, resulting in deformation of the picture and text dot, thorns, and incompatibility, resulting in a paste version and the like. In particular, after the dots are stacked, the ink layer is light and dull, and the level is unclear, presenting a large color deviation.

If the moisture is too large, the printed paper will be stretched due to absorption of excess moisture. At the time of depositing, the paper will naturally release moisture on all four sides, and the irregular expansion and deformation of the paper is too large to form overprinting of the printing material or the overprinting of the printing material.

Excessive moisture can also affect the imprinted dryness at different levels. The ink is saturated with the linking material and dried and evaporated. When it contains a large amount of water, it is difficult to penetrate, it also prolongs the time for volatilization and conjunctiva, and sometimes it is difficult to dry, affecting the continuous overprinting, and it is also easy to form the reverse side of the print.

The balance of water and ink in offset printing is consistent under the influence of variable elements in the mechanical movement and printing process. Therefore, there are many elements that affect the balance of ink and water, and they are also more complicated. However, there are also rules that can be followed. The overall criterion is: "Water and ink go."