The smoothness of the paper affects the quality of the Chocolate Boxes

The smoothness of the paper affects the quality of the Chocolate Boxes

As a method of expressing paper roughness, it is also an index for evaluating the degree of unevenness on the surface of paper and cardboard. Smoothness refers to the degree of unevenness of the microscopic geometry of the paper surface.

It is usually expressed by the time required to pass a certain volume of air under a certain degree of vacuum through the gap between the surface of the paper sample and the smooth glass surface under a certain pressure, and the unit is s. The rougher the surface of the paper, the smaller the resistance of the air passing through, and the shorter the time required; on the contrary, the smoother the surface of the paper, the greater the resistance of the air passing through, and the longer the time required.

In order to ensure the quality of the Chocolate Boxes, the paper should have a certain degree of smoothness, because it determines the tightness of the contact between the paper and the printing plate, thus affecting the transfer performance of the ink. The rougher the paper, the more ink is needed to meet the printing requirements, and the less ink is needed on smoother paper. In addition, increased inking on rough paper can lead to increased dot gain during Chocolate Boxes printing.

The ink transferred to the surface of the paper needs to be leveled first, and then dried. Under the premise of the same ink and printing conditions, the higher the smoothness of the paper, the better the ink leveling, and the better the gloss of the ink layer.

To sum up, before the printing work, the smoothness of the printing paper must be checked first, so that the quality of the Chocolate Boxes can be controlled and guaranteed.

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