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objects > components > bookblock components > interleaving (textblock components)
interleaving (textblock components)  
  • Leaves of text-weight blank paper, hard-sized for writing on, bound into textblocks to supply a blank leaf in between each text leaf for the purpose of writing notes on. They could be supplied in a number of different ways, either as tipped single leaves or bifolia folded into each gathering, with a bifolium of blank paper around the outside of alternate gatherings to supply a single blank leaf between each gathering. In the centre of the gatherings, some binders would provide a full bifolium, giving two blank leaves between the facing text pages or a single leaf with a folded stub, both of which would therefore be sewn with the gathering, or a tipped single leaf. Interleaved textblocks are commonly found in books used in educational environments, and the university booksellers appears to have sold textbooks, both new and secondhand, with interleaving.
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