K. Panthala Selvan a Gold Medallist in Diploma Printing Technology, 1999 went on to secure Bachelor’s degree in Printing Engg. & Graphics Communication, 2003 from PVG’s COET, University of Pune. His urge for continuous learning & upgrading himself in the field of Printing, he is now pursuing Masters in Printing Engg. from PVG’COET ,University of Pune. He developed interest in Pre-Press, after decades exploring himself into different work profiles.

Expanded Color Gamut printing for a narrow web Flexographic press

Akshay Joshi, P. V. G’s College of Engineering & Technology; Kiran Deshpande, Siegwerk; Panthala Selvan, Pressman Solutions

Expanded Color Gamut (ECG) printing has been growing in the packaging printing industry globally. In this study, we implemented the ECG printing with CMYKOGV inks for a narrow-web Flexographic printing process. This paper explores the key aspects of implementing ECG printing and performs gamut analysis by comparing the gamuts of CMYKOGV and CRPC6. The results show that the ECG printing process can be successfully implemented for a narrow-web Flexographic process with an acceptable accuracy of spot colors

Introduction

The global self-adhesive labels market size is projected to grow from USD 46.5 billion in 2020 to USD 59.2 billion by 2025.1With the expanding pool of brand choices in the fast-moving consumer goods (FMCG) Industry, brand managers and designers are searching for ways to attract customers to their respective brands. Flexography printing is a widely used process for label printing as it provides consistent color reproduction at greater machine speed.

Colors used in packaging of the product contribute the highest percentage to the buying decision of consumers. Traditionally, the CMYK process can produce a limited range of colors, hence spot colors have been used for achieving colors outside the CMYK gamut. However, printing with spot colors is not cost-effectiveand comes with its own challenges such as higher job changeover times and wastage.2

There arises a need to implement the Expanded Color Gamut (ECG) printing that utilizes seven colors namely CMYKOGV. There have been several studies exploring the ECG printing.2-12The ECG printing gives a higher quality of work due to a wider range of colors and larger color gamut.3The increased gamut with ECG leads to more color options for labels and packaging.

The motivation behind this study is to realize the practical implementation of ECG printing for a narrow-web flexographic process and to understand the key aspects and challenges during the implementation.