매트지의 오프셋 인쇄에서 PVC와 Solvent 함량이 인쇄적성에 미치는 영향

Abstract

Printing inks are basically dispersions of solid pigment particles in a vehicle. Pigment flocculation and/or colloidal aggregates created by thixotropy additives form a three-dimensional network in the inks. This structure complicates the flow behaviour of inks. However, if the internal structure is formed under control, the printing process will benefit from it because the ink must satisfy rheological requirements over a very wide range of shear conditions. The presence of internal structure results in the following prominent non-Newtonian rheological properties: viscoelasticity, yield stress, shear thinning and thixotropy. If the components of printing inks were changed, the rheological characteristics such as flow, viscosity, and not only tack value but also printing abilities on the paper were considerably varied, Thus, in this paper, the effects of changing the content of Linseed oil on rheological properties of the vehicle even until printed matter will be studied. For that, th rheological properties were found by flow, viscosity using each suitable equipment, creep/recovery using Hake Mars Ⅱ Rheometer. Emulsion rheology using lithotronic and printing ability using IGT printability tester. which will be investigated in this study.