Canton flannel. A medium grade of this cloth is used for back-lining.
Book cloth. If recovering or re-siding is done the library must have a supply of book cloths in the shades preferred. For re-siding, any cloth in grade 1 (see page 75) is sufficiently good. For recovering cloths in the grade which meets the requirements of the Bureau of Standards are none too good. If much recovering is done it is best to buy the cloth by the piece.
Crepeline. This very thin cotton cloth, also called mousseline, through which print is easily read, is sometimes pasted over the entire surface of pages which receive very hard usage, and which would otherwise be literally thumbed to pieces long before the rest of the book.
Specially prepared cloth. The Gaylord Bros., of Syracuse, and the Multum in Parvo Binder Co., of Philadelphia, manufacture hinges made of cloth. While these are often useful they cannot be used under any and all conditions, as one might be led to believe from the claims of the manufacturers.
Papers
Onion skin. Onion skin is a very thin, tough paper, used for mending torn pages, illustrations, etc., where print must show through. While it may be obtained gummed on one side, very little is gained, for it is nearly as easy to paste the ungummed onion skin as to moisten the gummed. For tears which do not run into the text; a thin, strong bond paper will be satisfactory.
Kraft or manila paper. A 30x40 60-pound kraft paper makes good end papers in recasing and recovering. A 70-pound manila paper may be used instead of kraft, if desired.
Red rope manila. This is a very strong, tough fibred cardboard which may sometimes be used as covers for books that it will scarcely pay to put into stouter covers. It may be obtained in several weights, the lighter weights being sufficiently strong for library use.
Thread
Even if no resewing is done, thread is necessary for making various repairs. The best are Hayes' linen thread No. 25, and Barbour's No. 40.