Before printing, you must choose the appropriate paper for the printed product, especially considering the factor of the expansion of the dot, and the choice of paper should be more cautious. The printing suitability of paper depends on its surface characteristics, such as the rapid acceptance of transfer ink, the greater the degree of expansion of the printed matter. Absorbency is a characteristic that determines the speed and amount of ink penetration into the paper. The better the absorption performance of the paper, the higher the percentage of dot expansion. When the ink is fixed on the absorbent paper, it will penetrate and diffuse.
The speed of paper absorption of ink plays a key role in the expansion of dots.
The flatness of the paper is the degree of deviation between the actual surface of the paper and the ideal plane. The relationship with dot expansion is that the higher the paper flatness, the smaller the dot expansion, and the lower the flatness, the greater the dot expansion. There are many types of coated paper on the market, such as glossy coated paper and matte coated paper. Coated paper helps to improve the fidelity of dot printing and the clarity of colors, because its absorption is lower than that of uncoated paper. As we all know, the low absorption paper, the network expansion is also small.
Non-coated paper has high absorption performance, and high-absorbency non-coated paper prints high screen image, and as a result, the dot expansion percentage is high.
In addition, the double reflection of paper to light can also cause network expansion. When the white light is irradiated on the white paper, about 80% of the white light is reflected, but when the white light is irradiated on the boundary between the ink dot and the white paper, only 10% of the white light is reflected. In this way, the human eye adds a circle of ink around the real dot when viewing the dot. Although the outlets have not actually changed, the information is that the outlets have expanded.
A Punch is a common office tool used to create holes in sheets of paper
Punch
Paper Puncher, Leather Punch, Metal Hole Punch, Circle Punch
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