Coating

Objectives of Paper Coating

 Objectives of Paper Coating The main purpose of coating is to improve the surface quality of paper or board. The quality improvement can be aimed at optical properties such as brightness, gloss or opacity, at tactile properties such as smoothness, but, most importantly, at printability and print image quality. The application of (usually white)...
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Requirements of Coated Papers for the Printing Process

Requirements of Coated Papers for the Printing Process Printed matters are used for advertising, news and information, transactions, edu¬cation, and entertainment. Here they are in competition with other communica¬tion media, such as radio and television, and the internet. Printing on packaging paper and board has the functions of advertising, delivering information, and showing data...
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Requirements of Base Papers : Board for Coating

Requirements of Base Papers/Board for Coating General Aspects Coated papers are classified as wood-containing or mechanical papers, and fine papers, which are also called woodfree, or WF papers. Wood-containing papers are made of a fiber furnish such as groundwood or other mechanical pulps. Recycled fibers (RCF) are also currently an important and steadily growing...
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Principles of Coating Techniques for Paper and Board

Principles of Coating Techniques for Paper and Board Historically, papers used to be coated in much the same way as painting a wall: the color was applied and distributed with a brush, then dried and smoothed. The process has remained essentially unchanged to the present day, although it has undergone major improvements over time....
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Components and Properties of Coating Colors

Components and Properties of Coating Colors Coating colors have a very simple composition, although the interactions between ingredients are far from simple. A coating color consists primarily of pigments dispersed in water, plus binders, cobinders and additives (see also Section 3.6.9.). Calculations are, as a rule, based on the dry product, even if the...
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paper questions