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纸张性能对印刷质量的影响!

  纸张的印刷性能决定了印刷过程能否顺利进行,能否得到高质量的印刷品。纸张的性能,印刷产品的质量。因此,肖斌认为,正确认识和认识纸张的一些特性,对准确把握印刷工艺的适宜性,保证印刷产品的质量具有重要意义。

  The printing performance of paper determines whether the printing process can be carried out smoothly and whether high-quality printing products can be obtained. Paper performance, printing product quality. Therefore, Xiao bin believes that it is of great significance to correctly understand and understand some characteristics of paper in order to accurately grasp the suitability of printing technology and ensure the quality of printing products.

  1. 表面强度

  1. Surface strength

  表面强度是指表面纤维、胶水、填料或纸张表面涂层颗粒之间以及涂层与纸基之间的结合强度。在印刷过程中对纸张表面的耐磨性、粉性、毛性起着决定性的作用。印刷时为了得到更清晰的网点,可以使用一些粘度较高的油墨,如果纸张表面强度不够,很容易出现粉末状和起毛状,并附着在印版的表面。

  Surface strength refers to the bonding strength between the surface fiber, glue, filler or coating particles on the paper surface and between the coating and the paper base. In the process of printing, it plays a decisive role in the wear resistance, powder and hairiness of paper surface. When printing, in order to get a clearer dot, you can use some inks with higher viscosity. If the surface strength of the paper is not enough, it is easy to appear powdery and hairy, and adhere to the surface of the plate.

  在济南印刷过程中,油墨在纸张与橡皮布之间发生分裂时,由于油墨的粘合力以及橡皮布与纸张之间的粘合力而产生剥离张力。当粘合强度不够时,印刷过程中会产生粘性纸,形成粉末或发丝,严重时会使纸张断裂。纸的表面本来应该有墨水的地方出现了白点。和粘性松散涂料、填料粒子和纤维会导致不良后果:一是导致污染的文本和文本部分,堆积在印刷板纸毛、纸粉越来越多,将导致糊版,印刷字迹模糊的照片,严重影响印刷质量;第二,在胶印橡皮布和滚筒上的清洗次数增加,降低了印刷效率。增加了打印机的劳动强度。

  In the process of printing in Shanghai, when the ink splits between the paper and the blanket, the peeling tension is produced due to the adhesion of the ink and the adhesion between the blanket and the paper. When the adhesive strength is not enough, sticky paper will be produced in the printing process, forming powder or hair, which will break the paper seriously. White spots appeared on the surface of the paper where there should have been ink. And sticky loose coating, filler particles and fibers will lead to adverse consequences: first, the text and text parts that lead to pollution will accumulate more and more paper wool and paper powder on the printing board, which will lead to the paste plate and the photos with fuzzy printing handwriting, which will seriously affect the printing quality; second, the cleaning times on offset blanket and roller will increase, reducing the printing efficiency. Increased the labor intensity of the printer.

  如果纸张表面粘接强度不够,有必要在印刷前适当降低油墨的粘度,以减少油墨对纸张的粘接力,同时也要防止表面粘接现象。

  If the adhesive strength of the paper surface is not enough, it is necessary to reduce the viscosity of the ink properly before printing to reduce the adhesive force of the ink on the paper, and at the same time to prevent the surface adhesive phenomenon.

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  2. 的吸收能力

  2. Absorption capacity

  所谓纸张吸墨是指纸张对油墨的吸收能力。纸张的吸墨性能是衡量印刷质量的重要指标。纸张对油墨的吸收取决于纸张纤维之间的紧密程度(缝隙的大小)。印刷用纸需要具有适当孔隙率的纸纤维结构。

  The so-called paper ink absorption refers to the paper's ability to absorb ink. The ink absorption performance of paper is an important index to measure the printing quality. The absorption of ink by paper depends on the tightness (gap size) between paper fibers. Printing paper needs a paper fiber structure with appropriate porosity.

  如果太松,纤维差距太大,纸张的油墨吸收性太强,易引起纸印一方面,另一方面联系材料过量吸收层或涂层,纸张油墨层由于缺乏联系,使颜料颗粒悬浮在纸、结膜干燥后旧的印刷标志颜色或失去光泽,甚至一些印记在摩擦,片状颜料颗粒,粉碎现象。纸张对油墨的吸收也可能导致渗透现象。

  If it is too loose, the fiber gap is too large, and the ink absorption of paper is too strong, it is easy to cause paper printing on the one hand, on the other hand, it is related to the excessive absorption layer or coating of materials. Due to the lack of connection between the ink layer of paper, the pigment particles are suspended in the paper and the conjunctiva after drying, the old printing mark color or luster is lost, and even some marks are in friction, flake pigment particles, and crushing phenomenon. Paper on ink absorption may also lead to penetration.

  纸张对油墨的吸收能力太小,它会减慢油墨表面的干燥速度,使印刷速度加快,并造成背面的印品蹭脏,尤其是经渗透干燥的凸版印刷和高速印刷时更甚。另外,在印刷时,使用吸墨性能差的纸张,其吸墨后的油墨性能也差。

  The paper's absorption of ink is too small, it will slow down the drying speed of the ink surface, accelerate the printing speed, and cause the back of the print to rub dirty, especially through the infiltration of dry letterpress and high-speed printing. In addition, when printing, the paper with poor ink absorption performance has poor ink absorption performance.


 
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