The process or effect of raising the grain of a
leather, usually by wetting and rubbing the grain
side with the hand or a piece of cork, causing the
grain to rise. Graining up is usually done after
the leather has been pared; its purpose is to
correct the flattened condition of the grain
caused by the pressure of paring. "Grained up"
usually refers to the process employed by the
bookbinder and is not to be confused withBOARDING (1) , which
is a process employed by the leather manufacturer.