SATRA STM 706 Bally permeometer

This machine assesses the water resistance of heavy leathers, particularly sole leathers. It is the only internationally accepted method for determining this property.

STM 706 uses a dynamic motion during the test closely corresponding to the conditions experienced during wear. The test piece is repeatedly bent and laid flat again under load, as a shoe sole during walking, while in contact with water on one of its sides. The penetration of moisture through the test piece is automatically detected and reported by an acoustic or visual signal.

It is possible to determine the following values using this unique piece of SATRA Bally test equipment:

• The time taken for the water to pass through the test piece
• The quantity of water absorbed by the test piece within different time intervals
• The quantity of water passing through the test piece and given up on to an absorbent layer within a defined time limit (permeability).