Investigation of the effects of silicone oil coating and hot air drying on the optical and physical properties of heat-set web offset printing papers

Dogan Tutak,Ahmet Akgul,Cem Aydemir

doi:10.24867/jged-2018-2-041

Abstract

Heat-set web offset printing is a printing system that ink dries quickly with hot air. It is one of the preferred printing techniques with high speed printing process and print quality. Web offset printing machines produce approximately 60,000-70,000 iph (impressions per hour). Because of this speed, printing paper should be very durable during the printing process. In this study, three different (70 g/m2 high-grade, 70 g/m2 glossy coated and 90 g/m2 matte coated) roll papers were used. All these papers were printed with Goss M600 web offset printing machine. Three kinds of samples (non-oven - non-silicone, ovened – non-silicone and ovened - siliconed) were taken from every paper type and optical and physical tests were applied to these samples. It was determined that heat-set web offset printing papers showed different responses to temperature and silicone oil coating in the direction of the obtained results. All printed papers were compared only to their own kind, not the other type of papers

Highlights

Web offset printing machines use an irrevocable printing method with high production speed (Kulachenko, Gradin, & Westerlind, 2005) and offset printing quality, especially for companies which have a high production capacity
Paper types from 35 g/m2 to 150 g/m2 WFC (Wood free Coated), MWC (Medium weight Coated), LWC (Lightweight Coated), MFC (Machine finished Coated), SC (Super calendared), UWF (Wood free uncoated)) and newsprint papers are preferred for heat-set printing
When coated papers are used in high quality jobs such as magazines and catalogs, ink cannot be absorbed by the paper a heat-set process should be applied to dry it quickly (Weboffsetprint, 2018)

Summary

Introduction

Web offset printing machines use an irrevocable printing method with high production speed (Kulachenko, Gradin, & Westerlind, 2005) and offset printing quality, especially for companies which have a high production capacity. In heat-set printing, the ink is applied to the paper surface by the printing units, and the printed paper is passed through an oven to provide the drying of the ink by means of hot air. During this passing, the drying takes place by evaporation of the binding agents (mineral oils) in the ink. In Heat-set printing, papers must rely on the effects of hot air drying, web tension, high speed, and ink / fountain solution balance (KCL, 2018). All printed papers were compared to only their own kind, not the other type of papers

Results and Discussion

10 Matte paper Glossy paper High grade

Conclusion