Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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ironing

The process of smoothing the grain surface of finished leather. Ironing customarily follows BOARDING (1) , and, although the grain is again made smooth by the ironing, the pattern produced by the boarding remains. The ironing makes the boarded leather softer and more flexible. It may be done by hand (much in the same manner as clothes are ironed), or, more commonly today in rotary ironing machines, in which the leather is passed over a polished, heated steel cylinder, which is thermostatically controlled at a pre-set temperature. The fine effect of ironing seemingly cannot be obtained by other processes, such as smooth-plating. (363 )




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