1. Ink absorption. The same ink absorbs different paper under the same printing conditions and produces different printing gloss. The structure of printing paper determines that there are concave and convex holes formed by plant fibers on the surface of paper. In Jinan Printing Plant, in order to achieve good uniformity and smoothness of the paper surface, the printing surface is usually coated with different thickness of pigments. Different absorptivity will inevitably make the color of the ink layer different.

　　2.济南标签印刷:哪三个因素影响印刷纸张的颜色2. 光泽和平滑度。印刷光泽度取决于纸张的光泽度和光滑度。印刷纸的表面属于半光泽表面，尤其是涂布纸。

　　2. Jinan Label Printing: Which three factors affect the color of printed paper 2. Gloss and smoothness. Printing glossiness depends on the glossiness and smoothness of paper. The surface of printing paper belongs to semi-glossy surface, especially coated paper.

　　3、纸张白度。纸张的白度、油墨层的颜色都会有或多或少的影响。对于相同的白板，白度不一样，油墨层的色差主要体现在专色油墨的黑色组成上，尤其是对于70多种颜色的亮度，影响尤为明显，导致专色油墨的比例差别很大。因此，在实际生产中也应选用同样白度的纸张印刷，以减少纸张印刷颜色的白度。

　　3. Paper whiteness. The whiteness of paper and the color of ink layer will have more or less influence. For the same white board, whiteness is different, the color difference of the ink layer is mainly reflected in the black composition of spot ink, especially for the brightness of more than 70 colors, the influence is particularly obvious, resulting in the different proportion of spot ink. Therefore, in order to reduce the whiteness of paper printing color, paper printing with the same whiteness should also be selected in actual production.

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