Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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glair ( glaire )

The preparation used to secure leaf metal to the covering material or edges of a book. It consists basically of egg white and vinegar, or, for the edges of a book, egg white and water. It may also be purchased in dry form (dry ALBUMEN ) and then mixed with vinegar or water. Glair must have the property (and be of the quality) of melting immediately upon the application of heat and then setting quickly upon the removal of heat, so that the impression of the heated letter or finishing tool will melt the glair to permit it to hold the leaf solidly to the surface when the tool is removed.

Two methods of applying glair are generally employed. If the slight gloss produced by the glair is not objectionable, the glair may be sponged over the entire surface to be tooled, and would in any case be applied over the entire edge of the book; however, if the gloss is objectionable, the design and/or lettering are tooled in blind and the glair is then applied to the blind impressions with a GILDER'S TIP . See also: BLOCKING POWDER ;SHELLAC SIZE .

(335 , 339 )

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