The Manufacture of Paper / With Illustrations, and a Bibliography of Works Relating to Cellulose and Paper-Making

by R. W. Sindall

Class 6. Printing and Lithographic Papers.

General Specification.—Rolled. Machine-made. Engine-sized. Loading not to exceed 15 per cent.

Class 7. Coloured Printings.

General Specification.—Rolled. Machine-made. Engine-sized.

Class 8. Copying and Tissue Papers.

Specification.—Machine-made. Free from loading. (Copying papers are required to give three good copies.)

Class 9. Brown Papers, Air-dried.

Specification.—Air-dried. Machine-made.

Note.—The mean breaking strain and mean stretch required are given for each paper. The figures represent the mean of the results obtained for both directions of the sheet, and are calculated on a strip of paper two inches wide and having a free length of seven inches between the clips.

In the case of papers indicating a larger breaking strain than the minimum required, a proportional increase in the stretch must also be shown.