The specimen (shoe upper leather or other flexible leathers) is flexed in a manner simulating conditions of wear.
Measurements are made of the following quantities:
a) The duration of flexing which is just sufficient to cause water to penetrate through the sample from one face to the other;
b) The percentage gain of weight of the specimen due to water absorption during one or more specified time intervals from the beginning of flexing;
c) The mass of water which is transmitted through from one face to the other during one or more specified time intervals from the beginning of flexing.

Supplied with: Operating instructions, conformity /calibration certificate, press knife, copper mesh, 6 probes, 6 pairs of clamps.
Standards: SATRA TM171; EN ISO 20344:6.13; IUP 10; EN 13518; ISO 5403.
Power consumption: 400 W
Noise: 65 dB
Power supply: 230 V AC – 50/60 Hz

Tester EL-26R assess the stiffness of leathers. The stiffness of leather is important to choose the right amplitude to use when performing the permeability test on the ‘BALLY’ penetrometer.
This equipment has force electronic measuring system.
To perform the test specimens are wrapped around a pair of standard cylinders 30.0 mm diameter. Afterwards the cylinders are installed on the flexing device and approached one another along its axis with a known stroke and the force resisting movement along the axis on the cylinders is assessed to the nearest 5 N on the digital meter. Afterwards the stiffness of leather is calculated.