Akshay V. Joshi received Bachelor’s Degree in 1994 and Masters Degree in 2011 Printing Engineering from University of Pune, India. He was awarded Ph.D. (Engineering) from Jadavpur University, Kolkata in 2015. Akshay V. Joshi is working as Assistant Professor in Printing Engineering Department at P. V. G’s College of Engineering and Technology, Pune, India since 1996. He is a research coordinator for almost 25 years in Printing Department. He is appointed as Board of Studies Coordinator and member Research and Recognition Committee for Printing Technology at Savitribai Phule Pune University. His main research interests are Flexography, Gravure and Flexible Packaging. He has conducted several research projects for industry both international and national. Akshay Joshi has published more than 15 papers in International Journals and Magazines and is a reviewer for International journals. He has presented more than 20 papers in International Conference and National Workshops. He has guided four candidates in Master Program in Printing Engineering and Evaluator for two Ph.D. candidates. He is been internationally qualified as G7 Expert by Idealliance USA and was instrumental in implementing first G7 calibration for Gravure and Flexography printing processes in India. He is a Life Member of Indian Society for Technical Education.

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-effective and 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.