The relationship between paper and outlet expansion

Before printing, proper paper must be selected for the printed products. In particular, considering the factors of dot gain, the choice of paper should be more careful.

The printability of the paper depends on its surface characteristics, such as the fast acceptance of the transfer ink, and the greater the dot enlargement of the print. Absorption is a property that determines the speed and amount of ink penetration into paper. The better the paper's absorption performance, the higher the percentage of dot gain. When the ink is fixed on the absorbent paper, penetration and diffusion occur. The rate of ink absorption by the paper plays a key role in the extent of dot gain. If printing 300 lines/inch prints, it is unwise to use highly absorbent paper.

The flatness of the paper is the degree of deviation between the actual surface of the paper and the ideal plane. The relationship with outlet expansion is that the higher the paper flatness is, the smaller the outlet expansion is and the lower the flatness is, the larger the outlet expansion is.

There are many types of coated paper on the market, such as glossy coated paper and matt coated paper. Coated paper helps to improve the fidelity of the dot-printing and the sharpness of the color because it is less absorbent than non-coated paper. As we all know, low-absorbency papers have small dot gains.

Non-coated paper has high absorbency, and highly absorbent non-coated paper prints high-line images, resulting in a high percentage of dot gain.

Recycled paper, theoretically, has the same dot enlargement as the base paper, but it is actually larger than the original paper.

Source: PACK.CN