This study describes the lightfastness properties of printed foil samples due to long‐time exposure. Lightfastness is an important property for any kind of print products to assess their print stability. The fastness properties of prints can be described in terms of print durability and image stability. It may also be used for verification of printed expiry date and authenticity or validity of the product. Moreover, any kind of deterioration in package print quality will affect the product's sale adversely. Little work has been conducted to study the fastness properties of printed films and foils. In this work, blister foils printed in the gravure printing process have been taken as the sample as they have extensive usage in food and medicine packaging. An artificial lightfastness tester BGD 865/A Bench Xenon Test Chamber (B‐SUN) is used to study the light fastness of Cyan, Magenta, Yellow, and Black inks on the foil. The spectral curves and colorimetric values are measured using an Ocean Optics Spectroradiometer (DH2000BAL) before and after exposure. A kinetic model is proposed to predict the fading rate of the printed foil. The optimal model has given excellent prediction with a correlation coefficient of 0.90 to 0.93 for Cyan, Magenta, Yellow, and Black prints, respectively. The largest color difference ΔE₀₀ is achieved for Yellow print followed by Magenta. Cyan and Black prints have shown small changes with time when the gravure prints are exposed to the artificial aging chamber.

中文翻译：

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通过光谱反射率研究泡罩箔上印刷品的耐光性

这项研究描述了由于长期暴露而导致的印刷箔样品的耐光性。耐光性是任何类型的打印产品评估其打印稳定性的重要属性。可以根据印刷耐久性和图像稳定性来描述印刷的牢度特性。它也可以用于验证印刷的有效期和产品的真实性或有效性。而且，包装印刷质量的任何恶化都会对产品的销售产生不利影响。研究印刷薄膜和箔片的牢度特性的工作很少。在这项工作中，采用凹版印刷工艺印刷的泡罩箔作为样本，因为它们在食品和药品包装中得到了广泛的使用。人造耐光性测试仪BGD 865 / A台式氙气测试室（B-SUN）用于研究箔上的青色，品红色，黄色和黑色墨水的耐光性。在曝光之前和之后，使用海洋光学分光光度计（DH2000BAL）测量光谱曲线和比色值。提出了动力学模型来预测印刷箔的褪色率。最佳模型给出了出色的预测，青色，品红色，黄色和黑色印刷的相关系数分别为0.90至0.93。最大色差Δ 最佳模型给出了出色的预测，青色，品红色，黄色和黑色印刷的相关系数分别为0.90至0.93。最大色差Δ 最佳模型给出了出色的预测，青色，品红色，黄色和黑色印刷的相关系数分别为0.90至0.93。最大色差Δ对于黄色打印，随后为洋红色，达到E ₀₀。当凹版印刷品暴露在人工时效箱中时，青色和黑色印刷品随时间变化很小。