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纸张的匀度对印刷品质量的影响!

  纸张的平整度,不仅影响纸张的性能,而且直接影响到印刷的质量。由于纸张的严重不平整,纸张表面会被包裹并呈现出“泡泡纱”状,因此不可避免地在印刷时出现流平性差和质量问题。一般均匀度较差的纸,对光源看时,透光不均匀,甚至呈“云花”状。这种纸张的均匀性差,表面平滑度相对较差,再加上松紧度不均匀,油墨的接受和吸收会产生很多的不均匀,这样的不均匀会干扰印刷画面的均匀性,降低印刷品的质量。

  The flatness of paper, not only affects the performance of paper, but also directly affects the quality of printing. Due to the serious unevenness of the paper, the paper surface will be wrapped and present a "seersucker" shape, so it is inevitable to have poor leveling and quality problems in printing. Generally, the paper with poor uniformity has uneven light transmission when viewed from the light source, even in the shape of "cloud flower". The uniformity of this paper is poor, the surface smoothness is relatively poor, coupled with uneven tightness, ink acceptance and absorption will produce a lot of unevenness, such unevenness will interfere with the uniformity of the printing screen, reduce the quality of the printed matter.

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  在印刷的实地部分,有时会出现轻微的不均匀性。这种不均匀度主要是浓度上的不均匀度,也有光泽上的不均匀度。造成这种不均匀的主要原因是纸张对油墨的吸收不均匀。这种吸收特性与纸张的均匀性密切相关。纸张均匀性差,纤维分布密度不均匀,松紧度的差异也比较明显,所以吸墨速度和吸墨速度也会不同,所以很容易产生印刷表面浓度和光泽不均匀的现象。

  In the field part of printing, there are sometimes slight unevenness. This kind of non-uniformity is mainly the non-uniformity of concentration, but also the non-uniformity of luster. The main reason for this unevenness is that the paper absorbs ink unevenly. This absorption characteristic is closely related to the uniformity of paper. The uniformity of paper is poor, the density of fiber distribution is uneven, and the difference of tightness is obvious, so the ink absorption speed and ink absorption speed will be different, so it is easy to produce the phenomenon of uneven printing surface concentration and gloss.

  同样,铜版纸的平整度也影响着印刷品的质量。对于铜版纸来说,直接吸收油墨的部位是涂层,但当原纸的均匀性较差时,就会造成涂层胶粘剂对原纸层渗透不均匀的现象,使自然涂层吸收油墨不均匀。此外,原始论文的均匀性,还将导致涂层的过程中,涂层不均匀,特别是当刮刀涂料涂层均匀性和一致性的原始论文有很大的相关性,因此原始论文常常导致膜层的均匀性吸收油墨不均匀。

  Similarly, the flatness of the coated paper also affects the quality of the printed matter. For copperplate paper, the part of directly absorbing ink is coating, but when the uniformity of base paper is poor, it will cause the phenomenon of uneven penetration of coating adhesive to base paper layer and uneven ink absorption of natural coating. In addition, the uniformity of the original paper will also lead to uneven coating in the process of coating, especially when there is a great correlation between the uniformity of the scraper coating and the consistency of the original paper, so the original paper often leads to uneven uniformity of the film absorption ink.

  其他纸张表面的缺陷和缺陷,如折痕、污迹、皱纹、灰尘、湿斑等,对印刷品的质量是不言而喻的。

  Other paper surface defects and defects, such as creases, stains, wrinkles, dust, wet spots, etc., are self-evident to the quality of printed matter.


 
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