Backing is described as shaping a ridge on each side of the spine of a text block after rounding it. Keeps the spine of the text block from collapsing from use. Backing also helps to prevent the spine of the textblock from collapsing into a concave shape over time

-see also:
"Backing" is in the HS Code "7410"
  Copper Foil (Whether Ornot Printed Or Backed With Paper, Paperboard,Plastics Or Similar Backing Mate
Ref: 122125/2006-09-21

Other Database Pages Exist for this Phrase:
Shaping (Shaping refers to positive reinforcement is given ...)
Concrete board (Concrete board pertains to a panel made out of ...)

List of books: Backing

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