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印刷厂采购纸张的要点是什么?

印刷厂很重要的原资料之一就是纸张,作为承印物,纸张的选择十分的重要。那么印刷厂是怎样来采购纸张的呢?采购纸张的过程中有哪些要点呢?我们一同来学习一下吧。纸张有很多特性,这些特性对印刷品有不同的影响。首先是墨膜,墨膜的厚度影响印刷品的光泽度。墨膜越厚,越有利于进步印刷品的光泽。印刷品的光泽度随着墨膜厚度进步的趋向,因不同的纸张而有所不同。

  Paper is one of the most important raw materials for printing plants. As a printing material, the choice of paper is very important. So how do printing companies buy paper? What are the key points in the process of purchasing paper? Let's study together. Paper has many characteristics, which have different effects on printed matter. First of all, ink film, the thickness of ink film affects the gloss of printed matter. The thicker the ink film, the better the gloss of printed matter. The glossiness of printed matter varies with the thickness of ink film.

  无论是什么纸张,光泽随墨膜厚度增加而进步的量都有一定的限度。其次是纸张上的空隙的大小,纸张上的空隙是吸收油墨的根底,孔隙的大小决议着吸收油墨的时间和衔接料的固着时间之间的均衡,影响着印刷品光泽度的构成。普通印刷品光泽均随纸张吸收才能的加强而降低。纸张的平滑度和自身的光泽度也影响着印刷品的光泽度。纸张的平滑度高,印刷品的光泽度就高。纸张自身的光泽度好,那么墨膜的反射率就高,从而印刷品的光泽度就高。

  No matter what kind of paper, the amount of gloss that improves with the increase of ink film thickness has a certain limit. Secondly, the size of the gap on the paper is the basis of ink absorption. The size of the gap determines the balance between the time of ink absorption and the fixing time of the bonding material, and affects the composition of the gloss of the printed matter. The gloss of ordinary printed matter decreases with the enhancement of paper absorption ability. The smoothness and glossiness of paper also affect the glossiness of printed matter. The smoothness of paper is high, and the gloss of printed matter is high. The paper itself has a good gloss, so the reflectivity of ink film is high, thus the gloss of printed matter is high.

  纸张平滑度、光泽和吸收才能之间也存在着相关性。纸张网点的大小也影响印刷品的色相变化。印刷品的墨量会影响网点,墨量增加网点变大,那么印刷品的反差将会遭到影响。网点变大会让反差变小,印刷品的细节和明晰度将遭到损失。通常会呈现印刷品含糊不清的状况,其实就是网点问题,而非通常我们说的图片精度不够,除非真的是那种质量十分的图片以外,很大一局部缘由就是网点增大而招致的反差变小、图像变暗、网点含糊。网点的直径越小,印刷品越精密,纸张的平滑度请求越高。这是纸张选购的一个要点,而在实践消费的过程中,还能够调理油墨的性能来顺应纸张。印刷品通常的套准请求都较高,误差控制在0.05mm内。

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  There is also a correlation between paper smoothness, gloss and absorptivity. The size of paper dots also affects the color change of printed matter. The ink content of printed matter will affect dots, and the contrast of printed matter will be affected if dots become larger with the increase of ink content. The dot change will make the contrast smaller, and the details and clarity of the printed matter will suffer. Usually, the ambiguity of printed matter is actually the dot problem, not the inadequate accuracy of the picture as we usually say. Unless it is really a picture of very high quality, a large part of the reason is that the contrast caused by dot enlargement becomes smaller, the image darkens, and the dot is ambiguous. The smaller the dot diameter, the more precise the printed matter, and the higher the smoothness requirement of the paper. This is a key point of paper purchase, and in the process of practical consumption, can also adjust the performance of ink to adapt to paper. Generally, the registration request of printed matter is higher, and the error is controlled within 0.05 mm.

  彩色印刷时,可能会呈现套版不准的状况,招致这种状况的缘由很多,不过印刷过程中纸张的含水质变化是十分重要的一个要素。纸张含水量的变化可能招致纸张的收缩或收缩,而且由于含水质变化使得纸张部分尺寸变化,从而产生其它方式的变形,如卷曲、皱摺等。为了使纸张的含水量在整个纸面上坚持平均分歧,并且与印刷车间的温湿度相顺应;同时为了使纸张对环境湿度的敏感水平有所降低,进步纸张尺寸的稳定性,普通在印刷之前,要停止调湿(吊晾)处置。

  There are many reasons for the inaccuracy of color printing, but the change of water content of paper is a very important factor in the process of printing. The change of paper moisture content may lead to shrinkage or shrinkage of paper, and the change of water content may change the size of part of paper, resulting in other forms of deformation, such as curling, folding and so on. In order to make the paper moisture content on the whole paper adhere to the average divergence, and adapt to the temperature and humidity of the printing workshop; at the same time, in order to reduce the paper's sensitivity to environmental humidity and improve the stability of paper size, it is necessary to stop the humidity adjustment (hanging) treatment before printing.

  纸张是印刷厂的重要原资料之一,纸质的好坏直接影响印刷品的好坏。纸张的特性不同,因而纸张的印刷顺应性也不同。在选购过程中,印刷厂依据印刷品的请求,来逐层挑选,以便到达好的印刷效果。

  Paper is one of the important raw materials of printing plants. The quality of paper directly affects the quality of printed matter. The characteristics of paper are different, so the printing compliance of paper is different. In the process of choosing and purchasing, the printing house chooses the printed matter layer by layer according to the request of the printed matter, in order to achieve the best printing effect.


 
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