Date of Award

4-2011

Degree Name

Master of Science

Department

Chemical and Paper Engineering

Department

Paper Engineering, Chemical Engineering and Imaging

First Advisor

Dr. Alexandra Pekarovicova

Second Advisor

Dr. Margaret Joyce

Third Advisor

Dr. Paul D. Fleming III

Access Setting

Masters Thesis-Open Access

Abstract

In product gravure printing, many spot color inks are used. Because the use of spot colors tends to be customer specific, they are typically mixed in house by the gravure printer to satisfy the requirements of a specific customer order. Printers are often concerned about the best utilization of inks, and their recyclability, if possible, to make the production more sustainable. Spot colors may exhibit metameric behavior. This tendency causes problems in color matching, as these products are viewed in a standardized environment, using light source D50 or D65 , but are viewed under fluorescent lighting at the time of purchase. Therefore, it is necessary to assess their behavior under different light sources, which enables one to predict their performance. A comparative study has been carried out between metamerism indices and inconstancy indices of metameric color pairs. Two base color ink sets were compared for metamerism indices and inconstancy indices. Reflectance data readings were measured with a spectrophotometer and CIE L *a*b* color coordinates were calculated for D65 , A, F2, and D50 illuminants. D65/100 was chosen as the reference illuminant, with illuminants A, F2, and D50 being considered as additional illuminants for calculating metamerism indices and color inconstancy indices The results show the importance of accounting for the change in perceived color when items are viewed under different lighting conditions.

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