Both of the above papers are finished on the paper machine, but Supercalendered paper is polished after being made, giving a higher shine to the surface for sharper reproduction of the details in the cuts when desired. However, the polishing of Uncoated paper has some effect on color, hence Supercalendered papers are not so bright in color as Machine Finish or English Finish and are also somewhat lower in bulk.

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Calender Stacks Which Give Paper a Smooth Finish, and Winding Rol

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SELECTION OF PAPER

Other types of paper finished on the paper machine are called Antique. Eggshell and Text. These papers have a rough or semirough finish suitable for use where only type or line cuts are used, but have good bulk and color. In general, the terms Antique and Eggshell are used for the medium and low grades, and Text is used for higher grades.

The term Offset paper implies paper made for use in the lithographic process, namely, hard sized or water resistant. Uncoated Offset paper has good color, strength, and bulk. The finish varies from fairly smooth to medium because the lithographic process does not require an absolutely level surface for the reproduction of cuts. Almost any paper can be run offset if sufficiently hard sized.

Coated paper is produced by the application to a special paper of a considerable amount of coating material, which is then polished. This coating material is generally composed of clay, casein, and other materials which will impart brightness or color to the final sheet. Either a high glossy finish or a semi-dull finish may be secured, depending upon the composition of the coating material used. Both are suitable for fine, detailed cuts, and the glossy Coated gives sharpness where semi-dull Coated gives softness. Coated paper is used for the best reproduction of halftone illustrations.