目的 研究白酒包装印刷品在紫外光照射下的颜色变化,并在此基础上进行耐光性能预测。方法 搜集4款18种常见酒包装印刷品,在氙灯耐气候试验箱下开展加速老化实验。用CIELAB和CIEDE2000色差值评价印刷品在不同老化时间下的耐光性。使用人工神经网络的方法预测酒包装产品在不同老化时间的光谱信息,进而预测其耐光性能。结果 印刷品在紫外光照射下会出现颜色褪变现象,红色印刷品会变亮变淡,对应明度增加饱和度降低。来自不同印刷企业的同一款酒包装产品的颜色变化有较大差异,在本次实验的加速老化条件下,一般在90 h后才出现不同产品的颜色变化。结论 结果表明,训练样本的老化时间应不少于90 h,才能进行样品的后期老化程度预测。实验结果也可为企业的印刷品油墨配方选取、光老化性能预测提供指导建议。
Abstract
The work aims to study the color changes of liquor packaging prints under ultraviolet light irradiation, and on this basis, predict the lightfastness properties. Eighteen common wine packaging prints from four categories were selected, and an accelerated aging test was carried out under xenon lamp weathering test chambers. The CIELAB and CIEDE2000 values were used to evaluate their lightfastness under different time. The obtained reflectance spectra were modeled by applying an ANN technique that was proposed to predict the fading rate of the liquor packaging prints. The results indicated that the prints would fade under the ultraviolet light, the red would become brighter and lighter, with the corresponding increase in brightness and decrease in saturation. The color change was quite different for the prints from different enterprises. It generally took 90 hours for different products to show differences under the accelerated aging conditions of this experiment. It shows that the number of training samples should not be less than 90 hours to predict the later aging degree of samples. The experimental results can also provide guidance for the selection of printing ink formula and light aging performance prediction.
关键词
白酒包装 /
印刷品 /
耐光性 /
色差 /
光老化时间
Key words
liquor packaging /
prints /
lightfastness properties /
color difference /
light aging time
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基金
国家固态酿造工程技术研究中心资助（2024HX24）
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