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Color reproduction on varnished cardboard packaging by using lower ink coverages due to the gray component replacement image processing
Color Research and Application ( IF 1.4 ) Pub Date : 2021-07-01 , DOI: 10.1002/col.22704
Tomislav Cigula 1 , Tomislav Hudika 1 , Davor Donevski 2
Affiliation  

Even in these challenging times, cardboard packaging industry is increasing its revenue with stable annual increase prediction, but customers are increasing demands on the packaging with respect to environmental protection, attractiveness, and branding. This article aims to determine the influence of image processing in terms of gray component replacement and overprint varnishing on the color reproduction on a cardboard packaging material. A test chart with tertiary colors was defined and modified by different gray component replacement levels. It was printed in accordance with ISO norm on coated and uncoated cardboard and finished by overprinting water based, offset, and UV varnish. The prepared samples were evaluated by measuring surface coverage, tone value increase (dot gain) of primary colors and calculating ΔE00 of defined tertiary colors. The results showed that gray component replacement application reduces ink consumption. Higher gray component replacement applied results in lower ink surface coverage, but the decrease is also dependent on the image content. The TVI (dot gain) is significantly influenced only by applying UV varnish, resulting with higher TVI. The color differences of the tertiary colors showed that increased level of the gray component replacement applied did not cause significant color differences, even decreased color difference in some cases. Additionally, applying gray component replacement decreased color differences in “reddish” part of the gamut. This research proved that lowering the ink consumption due to the gray component replacement will not cause significant differences in the color reproduction. Furthermore, varnishing with commercial offset or water-based varnish will not cause higher deviations in color reproduction, but use of the UV varnish would.

中文翻译:

由于灰色成分替换图像处理,使用较低的油墨覆盖率在涂漆纸板包装上进行色彩再现

即使在这些充满挑战的时代,纸板包装行业也在以稳定的年度增长预测增加其收入,但客户对包装在环保、吸引力和品牌方面的要求越来越高。本文旨在确定图像处理在灰色成分替换和套印上光方面对纸板包装材料色彩再现的影响。通过不同的灰色成分替换级别定义和修改了具有三次颜色的测试图。它按照 ISO 标准在涂层和未涂层​​纸板上印刷,并通过叠印水性、胶印和 UV 清漆完成。通过测量原色的表面覆盖率、色调值增加(网点增益)并计算ΔE来评估制备的样品00定义的三级颜色。结果表明,灰色组件更换应用减少了墨水消耗。应用更高的灰色成分替换会导致油墨表面覆盖率降低,但降低也取决于图像内容。TVI(网点扩大)仅受应用 UV 清漆的显着影响,从而导致更高的 TVI。三次色的色差表明,增加应用的灰色成分替换水平并没有引起显着的色差,在某些情况下甚至会降低色差。此外,应用灰色成分替换减少了色域“红色”部分的色差。这项研究证明,由于更换灰色成分而降低墨水消耗不会导致色彩再现的显着差异。此外,
更新日期:2021-07-01
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