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The Effects of Ink Dispersion and Printing Conditions on Printed Mottle  

Ha, Young-Baeck (Dept. of Paper Science & Engineering, College of Forest Sciences, Kangwon National University)
Lee, Yong-Kyu (Dept. of Paper Science & Engineering, College of Forest Sciences, Kangwon National University)
Kim, Chang-Keun (Changgang Institute of Paper Science and Technology, Kangwon National University)
Oh, Sung-Sang (Graphic Arts Media, Shin Gu College)
Lim, Jong-Hag (Daihan Ink Co. LTD)
Publication Information
Journal of Korea Technical Association of The Pulp and Paper Industry / v.38, no.4, 2006 , pp. 41-46 More about this Journal
Abstract
Printed mottle of coated paper is one of the most common but the most difficult problem in offset printing. Printed mottle is caused by an uneven penetration of Ink into the paper, binder migration, etc. For a high quality printing, development of new paper coating technologies to prevent print mottle is required. So for, the study of solving printed mottle is coated paper absorption controlled by base paper sizing and coating layer binder migration control. As a results, printed mottle has improved in coated paper. But printing is worked by interaction of printing ink, coated paper and printing pressure, then we need to understand of interaction printing work and coated paper. This research focused on a way of improving printed mottle by investigating various printing conditions such as ink dispersion, nip condition and amount of ink transfer using IGT printability tester.
Keywords
printed mottle; printing qualify; printing condition; ink dispersion; nip condition; printing pressure; amount of ink; IGT printability tester;
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