Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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edge index

A form of the INDEX consisting of marks on the edges of the pages of a book produced by means of printed rules that run to the edge of the sheet (bled) and can thus be seen on the fore edge of the closed book. Edge indexing has the advantage of being part of the printing process, and also allows the use of virtually unlimited headings, as well as adding nothing to the overall cost of binding. Its principal disadvantage is that the user does not know what the mark on the edge refers to while the book is closed. (234 )




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