blocking foil
A thin plastic film with a high vacuum deposit of
gold or other metal and backed by a
pressure-sensitive adhesive. White and colored
pigments are also available. They are used in the
same way as gold leaf, the impression being
obtained by means of a heated die, block, type,
etc. Blocking foils are used extensively in
library and edition binding. (81 , 92 , 161 )
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