Quantitative Analysis of Color Shift Induced by Diverse Coating Techniques on Offset-Printed Coated Media

Abstract

This research examines the color shift effects induced by various aqueous coatings—Gloss, Matt, and Neutral—on offset-printed coated media. Precise color reproduction is essential in the printing industry, where even minor deviations can affect print quality. Offset printing on coated paper provides high-quality output; however, post-printing coatings often cause shifts in colorimetric values, altering the appearance of printed colors. This study investigates the impact of these coatings on color shift, measured as ΔE, across four process colors (Cyan, Magenta, Yellow, and Black) and three types of coated media (C1S, Gloss Art, and Matt Art paper).

The findings reveal that Aqueous Gloss coating effectively stabilizes color, especially for Cyan and Black on C1S and Matt Art papers, showing reduced ΔE values and consistency, although it slightly increases shifts for Magenta and Yellow, notably on Gloss Art Paper. In contrast, Aqueous Matt coating generally increases ΔE across all colors and papers, causing the highest variability, particularly in Magenta and Yellow, making it less suitable for applications demanding minimal color shift. Aqueous Neutral coating provides a balanced effect, reducing ΔE values for Black and Yellow on Matt Art Paper while maintaining moderate color shifts for other colors. This balance offers a viable option where controlled color retention is needed, particularly for applications on Matt Art Paper.

In conclusion, Aqueous Gloss and Aqueous Neutral coatings are recommended for applications requiring color stability, with Aqueous Gloss excelling in Cyan and Black retention. Aqueous Matt coating induces higher color shifts, rendering it less effective for preserving original color fidelity. These findings highlight how coating choice can optimize color consistency in offset printing, allowing tailored applications based on substrate and desired color retention.