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Adhesive, a.k.a. "perfect" binding:
• uses adhesive (glue) to form signatures into "book
blocks"
• can bind books (as well as magazines and catalogs) up
to 2" thick
• produces books with soft covers and rectangular
"backbones"
There are two ways to do it:
• book blocks (gathered signatures) are ground and
roughened on one edge and glued to the cover spine (simplest, cheapest
method)
• the edges of the signatures in a block are notched or
perforated without roughening, enabling the glue to penetrate the block
for better adhesion to the cover (a.k.a. "burst perfect" binding)
Thread sewing:
• signatures are sewn together into book blocks that can
lie flat
• most widely used technique is called Smyth sewing
• sewing is stronger and more durable than gluing
• costly process; usually reserved for high-end items
such as encyclopedias and Bibles
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