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泽度是纸张表面镜面反射的程度
作者:admin 来源:http://www.sdhzyw.com 发布时间:2017-9-18 16:29:11 浏览次数:205

一般来说电分设计制版显影时,可与在相同曝光条件下晒出的灰梯尺空白级数来观察显影效果,如显影效果不好,需及时更换显影液.

Generally speaking, design plate is developed, with the sun at the same exposure conditions of the gray scale to observe the effect of blank series development, such as development effect is not good, need to replace the developer in a timely manner.

随着冲版量的不断增加和空气中的CO2不断溶入,显影液中的OHˉ浓度会下降,pH值将越来越低,显影时间应慢慢变长,至更后在正常曝光条件下PS版无法显影,这就是显影液疲劳衰退的现象.

With the red version of the increasing volume and continue into the air in the CO2, OH concentration in developing solution will decrease, the pH value will be more and more low, the developing time should grow longer, to the last in the normal exposure conditions PS version of this is not developing, developering fatigue recession.

济南宣传页印刷多少钱

但随着显影液pH值的降低,碱液对氧化层和涂层树脂的腐蚀力下降,版材的网点再现性及耐印力比用新配制的显影液好一些.

But with the decrease of pH value of developing liquid, the corrosion resistance of alkali solution to oxidation layer and coating resin decreased, and the reproducibility and the resistance to printing of the plate were better than those of the new formulation

1、平滑度.纸张是一种可压缩性材料,在印刷压力下,纸张的印刷平滑度是纸张表观平滑度与表面可压缩性的综合体现.纸张的平滑度是发映纸张表面平整、光滑程度的性能指标.

1, the smoothness of the paper. Is a compressible material, in the printing pressure, the printing of paper smoothness is a comprehensive reflection of apparent paper smoothness and surface compressibility. The smoothness of the paper is the performance indicators reflect the paper surface smooth degree.

2、光泽度.光泽度是纸张表面镜面反射的程度,主要取决于纸张表面的粗糙度和构成纸张的物质的性质.光泽度高的纸张,在相同的条件下,油墨的色强度大,而色偏和灰度小,否则墨层的色强度低,色偏和灰度比较高,造成彩色套印灰平衡控制困难.

2, gloss. Gloss is a mirror reflection of the surface of the paper, mainly depends on the paper surface roughness and structure properties of paper material. High gloss paper, under the same conditions, the intensity of color ink, and color and gray, or color ink layer of low intensity, color and gray comparison high, resulting in color printing gray balance control difficult.

3、油墨的吸收性能.在实际印刷中,纸张对油墨的吸收性可分为两个阶段:加压渗透和自由渗透,主要取决于印刷压力和纸张表面空隙结构的分布.通常采用KN值来表示纸张对油墨的吸收性能.

3, the ink absorption performance. In actual printing paper, ink absorption can be divided into two stages: pressure infiltration and free penetration, distribution mainly depends on the printing pressure and paper surface voids structure. KN is usually used to represent the value of absorption of the ink on paper.

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