The lightfastness of prints is an extremely important characteristic for assessing their print stability. The fastness properties of prints can be described in terms of print durability and image stability. Good lightfastness assures the good print stability after long use. This study
has focused to describe the lightfastness of printed foil samples due to long time exposure. It may also be used for the authenticity or validity of the product. Moreover, any kind of deterioration in package print quality will affect the sale value of the product adversely. Little work has
been done to study the fastness properties of printed films and foils. In this work, blister foils printed in the gravure printing process are taken as the sample as it has extensive usage in food and medicine packaging. The samples are exposed in artificial lightfastness tester BGD 865/A
Bench Xenon Test Chamber (B-SUN) for assessing the light fastness of cyan, magenta, yellow and black ink on the foil. The spectral curves and colorimetric values of prints are measured in the ocean optics spectroradiometer (DH2000BAL) before and after exposure. An Artificial Neural Network
model (ANN) is proposed to predict the fading rate of the printed foil. The optimal model gives excellent prediction with the minimum mean square error (MSE) for each color and a correlation coefficient of 0.98-0.99.
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Document Type: Research Article
April 7, 2020
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