很多人對(duì)于印刷的質(zhì)量問(wèn)題并不了解，把問(wèn)題的原因歸咎于印刷設(shè)備，其實(shí)是錯(cuò)誤的，紙張的特性對(duì)于印刷品來(lái)說(shuō)也是關(guān)重要的影響因素。濟(jì)南印刷廠為大家詳細(xì)介紹紙張含水量對(duì)印刷品質(zhì)量的影響。

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.

對(duì)于精細(xì)的印刷品，套準(zhǔn)要求較高，一般允許誤差在0.05mm內(nèi)。多色印刷中，引起套印不準(zhǔn)的原因很多，但印刷過(guò)程中紙張因含水量變化而產(chǎn)生的紙張變形是一個(gè)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.

紙張的含水量是指紙張中所含水分的重量占該紙張重量的百分比。紙張含水量過(guò)大時(shí)，紙中纖維、填料與膠料之間的結(jié)合力就容易降低，由此將降低紙張的硬度和挺度，影響紙張表面強(qiáng)度，導(dǎo)致印刷產(chǎn)品出現(xiàn)脫墨、分層等不良情況發(fā)生，還易增加紙張塑性、產(chǎn)生變形、造成印品套印不準(zhǔn)、延長(zhǎng)印跡干燥時(shí)間、印品背面粘臟，

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,

如果紙張含水量過(guò)低的話，導(dǎo)致紙張彈性差，紙發(fā)脆，降低撕裂度，印刷時(shí)易產(chǎn)生靜電。紙張含水量的變化不僅導(dǎo)致紙張的膨脹或收縮，而且還會(huì)因?yàn)楹孔兓沟眉垙埦植砍叽缱兓?，從而?dǎo)致紙張變形，卷曲、打皺、荷葉邊等。紙張變形是引起多色印刷套印不準(zhǔn)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室溫一定，高濕度時(shí)相對(duì)濕度變化引起含水量的變化率比中濕度時(shí)相對(duì)濕度變化引起含水量的變化率大得多;低濕度時(shí)也是如此。從這一角度看，印刷在中等濕度條件下進(jìn)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.

②兩者組成一個(gè)閉合的滯后回路，這種現(xiàn)象稱為紙張的調(diào)濕滯后現(xiàn)象。為了使紙張的含水量在整個(gè)紙面上保持均勻一致，對(duì)環(huán)境濕度的敏感程度有所降低，提高紙張尺寸的穩(wěn)定性，一般在印刷之前，要進(jìn)行調(diào)濕處理。

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.

濟(jì)南印刷廠提醒大家，在印刷時(shí)我們要選擇質(zhì)量好的紙張，很多商家為了牟利在印刷用紙上偷工減料，這樣的印刷品十分的影響視覺(jué)感受。更多相關(guān)注意事項(xiàng)就來(lái)我們網(wǎng)站http://775828.cn咨詢了解吧！

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://775828.cn Ask and understand!