Date of Award

6-1963

Degree Name

Bachelor of Science

Department

Pulp and Paper Technology

Abstract

In the demanding and ever-changing area of paper finishing a new and relatively unpublicized operation has appeared. The operation is one of brush finishing, where a high-speed cylindrical bristle brush is employed continuously against a paper web in order to develop desirable surface properties. The principle involved is a simple low-pressure polishing action not unlike shining one’s shoes. The performance of this new method, however, is obscure due to the absence of published information on the subject in available literature.

Through local industry a portable laboratory model brush finisher was made available to the Paper Technology Department of Western Michigan University. Because of the availability of both this apparatus and an existing laboratory supercalendar, and because of the complete lack of literature information on the topic of brush finishing, there seemed good reason to conduct an exploratory comparison of the two finishing methods. This investigation will evaluate and compare many common optical surface characteristics of both brush-finished and supercalendered papers and it will especially compare the printing fidelity obtained on each.

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