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[BKARTS] Blocking Powder

The following defination is taken from Bookbinding and the Conservation of 
Books A Dictionary of Descriptive Terminology by Etherington and Roberts:

A finely ground resin used in dusting over the impressions in silk and 
velvet (and other delicate substrates-DL) before gold tooling. Such resins 
are used in lieu of GLAIR because moisture would stain the silk or velvet. 
The powder has the advantage of requiring only a moderately hot tool, 
whereas glair requires considerably more heat to make the gold adhere. 
Blocking powder, however, does not provide the solidity of adhesion to gold 
leaf that is obtainable with a liquid size; therefore, it is generally used 
only when a liquid size is impractical.

best wishes,


David Lanning
J. Hewit & Sons Ltd.
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