The reason of the differences between printing sample and the original products.
http://www.cutcnccam.com/article-show-2011128956306.shtml
① The original transmission is different form the reflection prints. Transmitted light transmission of the original is viewed by transmitted light, and printing products is viewed by reflected light, a different light source, So the quality is different.
② dyes and pigments fineness is different fineness. Transmission is the original dye purity, while the print is based on the pigment (ink) Condition, there existed differences in color, so the quality effect is entirely different.
③ range of their different densities. Original transmission is generally higher density, the density contrast is large, while the print ink and paper combination is subject to capacity constraints, and its low density, the density contrast is small, therefore the larger the gap between the performance of the density range. Even if the original copy of the print reflection, there is disparity between the density range.
④ continuous tone levels and different levels of screening. Transmission of a continuous tone original level, based on levels of fine particles of dye, while the print form for printing network level, both in tone reflects the existence of a gap.
⑤ through reflecting different visual effect. Watch the original transmission of natural light and artificial light sources in the next, the effect is very different, so the observation of the original and print samples on the standard light source color temperature 5000K, color rendering index of 92 or more fluorescent light is ideal. Different lighting conditions due to its color effect is different.
The five points above are is the basic reasons of the copy can not totally meet the effects of original.
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