Nowadays, printing has more and more occupied people's vision, we can not live without a variety of printing. With the advent of the Internet, electronic reading has challenged traditional paper reading, but the printing industry is still thriving. Many people don't know about the quality of printing. It's a mistake to blame the printing equipment for the problem. The characteristics of the paper are also crucial to the quality of the printed matter. The Ji'nan printing house specifically introduces the influence of paper characteristics on printed matter.

一、纸张含水量对印刷品质量的影响

1. The influence of paper moisture content on the quality of printed matter

关于精细的印刷品，套准要求较高，一般答应误差在0.05mm内。多色印刷中，引起套印禁绝的原因许多，但印刷过程中纸张因含水量改变而发作的纸张变形是一个重要因素。

For fine printed matter, the requirement for registration is high, and generally the error is within 0.05mm. In multicolor printing, there are many reasons for the prohibition of overprinting, but the paper deformation caused by the change of water content in the printing process is an important factor.

纸张的含水量是指纸张中所含水分的分量占该纸张分量的百分比。纸张含水量过大时，纸中纤维、填料与胶料之间的结合力就简单下降，由此将下降纸张的硬度和挺度，影响纸张外表强度，导致印刷产品呈现脱墨、分层等不良状况发作，还易添加纸张塑性、发作变形、形成印品套印禁绝、延长印迹枯燥时刻、印品反面粘脏;假如纸张含水量过低的话，导致纸张弹性差，纸发脆，下降撕裂度，印刷时易发作静电。纸张含水量的改变不仅导致纸张的胀大或缩短，并且还会因为含水量改变使得纸张部分尺度改变，然后导致纸张变形，卷曲、打皱、荷叶边等。纸张变形是引起多色印刷套印禁绝的重要因素。

The moisture content of paper refers to the percentage of water content in paper. When the moisture content of paper is too high, the bonding force between fiber, filler and adhesive will simply decrease, which will reduce the hardness and stiffness of paper, affect the paper surface strength, resulting in printing products showing deinking, delamination and other adverse conditions, but also easy to add paper plasticity, seizure deformation, the formation of print overprint ban, delay. If the moisture content of the paper is too low, it will lead to poor elasticity of the paper, brittle paper, reduced tear, easy to occur static electricity when printing. The change of paper moisture content not only leads to the expansion or shortening of paper, but also changes the size of paper due to the change of water content, and then leads to paper deformation, curling, wrinkling, lotus leaf edge and so on. Paper deformation is an important factor causing the prohibiting of multicolor printing.

①室温必定，高湿度时相对湿度改变引起含水量的改变率比中湿度时相对湿度改变引起含水量的改变率大得多;低湿度时也是如此。从这一视点看，印刷在中等湿度条件下进行有利。

(1) At room temperature, the change rate of water content caused by the change of relative humidity at high humidity is much greater than that caused by the change of relative humidity at moderate humidity, and the same is true at low humidity. From this point of view, printing is most advantageous under moderate humidity.

②两者组成一个闭合的滞后回路，这种现象称为纸张的调湿滞后现象。为了使纸张的含水量在整个纸面上坚持均匀共同，对环境湿度的灵敏程度有所下降，进步纸张尺度的安稳性，一般在印刷之前，要进行调湿处理。

(2) they form a closed hysteresis loop, which is called the hysteresis phenomenon of paper wetting. In order to make the moisture content of paper uniform and common throughout the paper, the sensitivity to environmental humidity has decreased, improve the stability of paper size, generally before printing, wet processing.

二、纸张的滑润度对印刷品质量的影响

Two. The influence of smoothness of paper on the quality of printed matter

纸张的滑润度是一个很重要的印刷适性，它影响油墨搬运是否、图文是否明晰的重要因素。滑润度高的纸张，在墨层厚度稍有改变时，仍能坚持较高、较安稳的油墨搬运率，并能在纸面上很快构成均匀滑润的枯燥墨膜，具有杰出的光泽性，色彩层次丰厚、艳丽、明快;反之，滑润度低的纸张，因为外表高低不平，有孔隙，油墨浸透较多，墨层光泽性差，小网点会落到纸面凹处而印不上，印品层次不清楚，严峻时会形成印刷品印不实、色相偏差等，直接影响到印刷品的印刷作用，尤其是关于印刷要求较高的烟标，更应挑选滑润度高的纸张进行出产印刷。

The smoothness of paper is an important factor for printing suitability, which affects the overall ink handling and the clarity of the picture and text. When the ink layer thickness is slightly changed, the paper with high smoothness can still adhere to a higher and more stable ink transfer rate, and can quickly form a uniform and smooth dry ink film on the paper, with outstanding luster, rich color layers, gorgeous, lively; on the contrary, the paper with low smoothness, because of its uneven appearance, porous. Clearance, ink immersion more, ink layer gloss poor, small dots will fall into the concave part of the paper and can not print, the printing level is not clear, severe printing will form impractical, color deviation, etc., directly affect the printing effect of the printed matter, especially on the printing requirements of higher cigarette marks, should choose a high smoothness of the paper into Print production.

三、纸张的白度对印刷品的影响

Three. The effect of whiteness of paper on printed matter

纸张的白度是指纸张受光照耀后反射的才能，也是纸张亮光的程度。一般来说，纸张白度越高，被吸收丢失的色度分量越小，复制作用越佳，印刷图画体现的色彩明朗，阶调层次反差也显得激烈，立体感强;反之，印刷图画所体现的色彩和阶调层次就会暗淡，反差短少短少立体感。可是，并不是纸张的白度越高就越好，不适宜的高白度因反射的光能过强，增强了对视觉神经的影响，易于引起视觉疲惫。任何白纸都有偏色现象，不是肯定中性白。因而，无论如何，同一批供给的纸张有必要白度共同、色彩均匀、色差根本共同，不然印刷品就会有显着的色彩分层、色相不匀现象。

The whiteness of paper refers to the ability of paper to reflect fully after being illuminated, and also to the degree of brightness of paper. Generally speaking, the higher the whiteness of the paper, the smaller the chromaticity component absorbed and lost, the better the reproduction effect, the brighter the color reflected in the printed pictures, the more intense the contrast of the tone levels, and the stronger the stereo sense; otherwise, the color and tone levels reflected in the printed pictures will be dim, the less the contrast is short and the less the stereo sense. However, it is not the higher the whiteness of the paper, the better, inappropriate high whiteness because the reflected light energy is too strong, enhance the impact on the visual nerve, easy to cause visual fatigue. Any white paper is biased, not neutral. Therefore, in any case, it is necessary for the same batch of paper to have the same whiteness, color uniformity and color difference, otherwise the printed matter will have a significant color stratification, color unevenness.

四、纸张的油墨吸收功能对印刷品的影响

Four. The influence of ink absorption function of paper on printed matter

纸张的油墨吸收功能是是油墨对纸张的浸透才能。假如纸张对油墨的吸收才能过大，会导致印品色彩的浓度显着下降，不能达到应有的色彩饱和度，一起墨层也短少光泽度，此外，因为纸面上油墨层中短少连接料，颜料颗粒悬浮在纸面上，得不到满足的维护，印品上的墨膜不结实，简单使印迹发作“粉化”也就是脱墨现象，一起还会呈现呈色作用不良，墨色密度下降，乃发作透印现象。纸张对油墨吸收性太差，在印刷过程中虽能够得到色彩艳丽的墨层，但影响油墨的浸透凝结和氧化聚合作用，印品墨层附着不结实，简单发作反面蹭脏现象，别的，纸张吸墨性过弱不利于进步印刷速度，然后也影响出产效率的进步，因而，精确评价纸张的油墨吸收才能并猜测其对印刷品质量的影响，关于印刷产品质量的操控和质量的进步都具有非常重要的含义。

The ink absorption function of paper is the ability of ink to soak the paper. If the paper can absorb too much ink, will lead to a significant decline in the concentration of printing color, can not achieve the desired color saturation, together with the ink layer is also short gloss, in addition, because the ink layer on the paper is short of connectors, pigment particles suspended on the paper, can not meet the maintenance, the ink film on the printing is not Solid, simple imprinting attack "pulverization" is deinking phenomenon, together with a poor color rendering effect, ink density decline, and even the occurrence of overprinting phenomenon. The paper absorbs the ink too badly, although it can get the bright color ink layer in the printing process, but it affects the ink's immersion condensation and oxidation polymerization, the ink layer adhesion is not solid, simple occurrence of reverse smudging phenomenon, in addition, the paper's weak ink absorption is not conducive to improving the printing speed, and then also affects the production efficiency. As a result, it is of great significance to accurately evaluate the ink absorption capacity of paper and to guess its impact on the quality of printing, and to control and improve the quality of printing products.