1. See: BURSTING
STRENGTH . 2. The breaking load or force,
expressed in pounds per inch, required to rupture
a material, such as cloth or paper. breathing. A
property of leather, characterized by a resistance
to water in the liquid form but having the ability
to allow the passage of water vapor. "Breathing"
is considered important in maintaining the
suppleness and handle of leather, and is one
reason why some conservationists oppose the use of
hard waxes in leather dressings.