Correlating Changes in Densitometry and Colorimetry in the Context of the Light-Induced Fade of Inkjet Photographic Prints
Abstract:The current ANSI standard method for evaluating the image stability of photographic prints (ANSI IT9.9-1996) calls for the use of densitometry in order to determine the extent of light-induced fade and to provide an estimate of print-life under real-world conditions. End-of-life criteria based on densitometry can involve monitoring simultaneously as many as 24 different end-points (excluding changes to Dmin). Conceivably, end-of-life criteria based on colorimetric measures such as ΔE or ΔC could reduce the number of end-points from 24 to as few as 7—one criterion for each primary (cyan, magenta, yellow), secondary (blue, green, red), and neutral (gray/black) test patch. In the context of evaluating inkjet photographic prints based on hundreds of different combinations of various manufacturers' inks and receivers, we have been following the kinetics of dye-fade by both Status A densitometry and CIELAB colorimetry. In this report, we will begin to explore the empirical correlation between densitometric and colorimetric measures of color change.
Document Type: Research Article
Publication date: January 1, 2002
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