The objective of these experiments is to determine the lightfastness properties of various inks and most common digital printing methods. Lightfastness is the degree to which a dye or ink resists fading due to light exposure. Each ink has a different degree of resistance to fading by light. Because light is energy, the energy that is absorbed by pigmented compounds degrades the compounds or nearby molecules. The experiments described in this document involve printed samples subjected to equal amounts of sunlight exposure using accelerated methods. Statistical analysis comparing before and after data include average color change in terms of AE and overall gamut volume is compared. From these calculations, resistance to lightfastness can be accurately quantified.
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