很多人对于印刷的质量问题并不了解，把问题的原因归咎于印刷设备，其实是错误的，纸张的特性对于印刷品来说也是关重要的影响因素。济南印刷厂为大家详细介绍纸张含水量对印刷品质量的影响。

Many people do not understand the printing quality problem. It is wrong to blame the printing equipment for the problem. The characteristics of paper are also important factors for printed materials. Jinan Printing Factory introduces the influence of paper moisture content on the quality of printed matter in detail.

对于精细的印刷品，套准要求较高，一般允许误差在0.05mm内。多色印刷中，引起套印不准的原因很多，但印刷过程中纸张因含水量变化而产生的纸张变形是一个重要因素。

For fine print, the registration requirements are high, and the allowable error is generally within 0.05mm. In multi-color printing, there are many reasons for inaccurate overprint, 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重量占该纸张重量的百分比。纸张含水量过大时，纸中纤维、填料与胶料之间的结合力就容易降低，由此将降低纸张的硬度和挺度，影响纸张表面强度，导致印刷产品出现脱墨、分层等不良情况发生，还易增加纸张塑性、产生变形、造成印品套印不准、延长印迹干燥时间、印品背面粘脏，

The water content of paper refers to the percentage of the weight of water contained in the paper to the weight of the paper. When the water content of the paper is too high, the binding force between the fibers, fillers and sizing materials in the paper is easy to reduce, which will reduce the hardness and stiffness of the paper, affect the surface strength of the paper, lead to undesirable situations such as deinking and layering of the printed products, and also increase the plasticity of the paper, produce deformation, cause inaccurate overprinting, prolong the drying time of the print, and make the back of the printed products dirty,

如果纸张含水量过低的话，导致纸张弹性差，纸发脆，降低撕裂度，印刷时易产生静电。纸张含水量的变化不仅导致纸张的膨胀或收缩，而且还会因为含水量变化使得纸张局部尺寸变化，从而导致纸张变形，卷曲、打皱、荷叶边等。纸张变形是引起多色印刷套印不准的重要因素。

If the water content of the paper is too low, it will lead to poor elasticity of the paper, brittle paper, reduced tearing, and easy to generate static electricity during printing. The change of paper moisture content not only leads to the expansion or contraction of the paper, but also changes the local size of the paper due to the change of water content, resulting in paper deformation, curling, wrinkling, ruffles, etc. Paper deformation is an important factor that causes overprint inaccuracy in multi-color printing.

①室温一定，高湿度时相对湿度变化引起含水量的变化率比中湿度时相对湿度变化引起含水量的变化率大得多;低湿度时也是如此。从这一角度看，印刷在中等湿度条件下进行有利。

① At a certain room temperature, the change rate of water content caused by the change of relative humidity at high humidity is much greater than that at medium humidity; This is also true at low humidity. From this point of view, printing in moderate humidity conditions is advantageous.

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保持均匀一致，对环境湿度的敏感程度有所降低，提高纸张尺寸的稳定性，一般在印刷之前，要进行调湿处理。

② The two constitute a closed hysteresis loop, which is called the hysteresis of paper humidity regulation. In order to keep the moisture content of the paper uniform on the whole paper surface, reduce the sensitivity to environmental humidity, and improve the stability of the paper size, moisture conditioning treatment is generally required before printing.

济南印刷厂提醒大家，在印刷时我们要选择质量好的纸张，很多商家为了牟利在印刷用纸上偷工减料，这样的印刷品十分的影响视觉感受。更多相关注意事项就来我们网站http://www.xinfengyinshua.cn咨询了解吧！

Jinan Printing Factory reminds everyone that we should choose high-quality paper when printing. Many businesses cut corners on printing paper to make profits. Such printing products greatly affect visual perception. More relevant precautions come to our website http://www.xinfengyinshua.cn Ask and understand!