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、紙張含水量對印刷品質量的影響

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

關于精細的印刷品，套準要求較高，一般答應誤差在0.05mm內。多色印刷中，引起套印禁絕的原因許多，但印刷過程中紙張因含水量改變而發作的紙張變形是一個重要因素。

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.

紙張的含水量是指紙張中所含水分的分量占該紙張分量的百分比。紙張含水量過大時，紙中纖維、填料與膠料之間的結合力就簡單下降，由此將下降紙張的硬度和挺度，影響紙張外表強度，導致印刷產品呈現脫墨、分層等不良狀況發作，還易添加紙張塑性、發作變形、形成印品套印禁絕、延長印跡枯燥時刻、印品反面粘臟;假如紙張含水量過低的話，導致紙張彈性差，紙發脆，下降撕裂度，印刷時易發作靜電。紙張含水量的改變不僅導致紙張的脹大或縮短，并且還會因為含水量改變使得紙張部分尺度改變，然后導致紙張變形，卷曲、打皺、荷葉邊等。紙張變形是引起多色印刷套印禁絕的重要因素。

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室溫必定，高濕度時相對濕度改變引起含水量的改變率比中濕度時相對濕度改變引起含水量的改變率大得多;低濕度時也是如此。從這一視點看，印刷在中等濕度條件下進行有利。

(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.

②兩者組成一個閉合的滯后回路，這種現象稱為紙張的調濕滯后現象。為了使紙張的含水量在整個紙面上堅持均勻共同，對環境濕度的靈敏程度有所下降，進步紙張尺度的安穩性，一般在印刷之前，要進行調濕處理。

(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、紙張的滑潤度對印刷品質量的影響

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

紙張的滑潤度是一個很重要的印刷適性，它影響油墨搬運是否、圖文是否明晰的重要因素。滑潤度高的紙張，在墨層厚度稍有改變時，仍能堅持較高、較安穩的油墨搬運率，并能在紙面上很快構成均勻滑潤的枯燥墨膜，具有杰出的光澤性，色彩層次豐厚、艷麗、明快;反之，滑潤度低的紙張，因為外表高低不平，有孔隙，油墨浸透較多，墨層光澤性差，小網點會落到紙面凹處而印不上，印品層次不清楚，嚴峻時會形成印刷品印不實、色相偏差等，直接影響到印刷品的印刷作用，尤其是關于印刷要求較高的煙標，更應挑選滑潤度高的紙張進行出產印刷。

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、紙張的白度對印刷品的影響

Three. The effect of whiteness of paper on printed matter

紙張的白度是指紙張受光照耀后反射的才能，也是紙張亮光的程度。一般來說，紙張白度越高，被吸收丟失的色度分量越小，復制作用越佳，印刷圖畫體現的色彩明朗，階調層次反差也顯得激烈，立體感強;反之，印刷圖畫所體現的色彩和階調層次就會暗淡，反差短少短少立體感。可是，并不是紙張的白度越高就越好，不適宜的高白度因反射的光能過強，增強了對視覺神經的影響，易于引起視覺疲憊。任何白紙都有偏色現象，不是肯定中性白。因而，無論如何，同一批供給的紙張有必要白度共同、色彩均勻、色差根本共同，不然印刷品就會有顯著的色彩分層、色相不勻現象。

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、紙張的油墨吸收功能對印刷品的影響

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

紙張的油墨吸收功能是是油墨對紙張的浸透才能。假如紙張對油墨的吸收才能過大，會導致印品色彩的濃度顯著下降，不能達到應有的色彩飽和度，一起墨層也短少光澤度，此外，因為紙面上油墨層中短少連接料，顏料顆粒懸浮在紙面上，得不到滿足的維護，印品上的墨膜不結實，簡單使印跡發作“粉化”也就是脫墨現象，一起還會呈現呈色作用不良，墨色密度下降，乃發作透印現象。紙張對油墨吸收性太差，在印刷過程中雖能夠得到色彩艷麗的墨層，但影響油墨的浸透凝結和氧化聚合作用，印品墨層附著不結實，簡單發作反面蹭臟現象，別的，紙張吸墨性過弱不利于進步印刷速度，然后也影響出產效率的進步，因而，精確評價紙張的油墨吸收才能并猜測其對印刷品質量的影響，關于印刷產品質量的操控和質量的進步都具有非常重要的含義。

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.