Auxiliary Apparatus Manufacturer,Supplier and Exporter in India
Product Code : EL-LTE-13232
Quick Answer: The Auxiliary Apparatus is used for deciding whether a particular leather or group of leathers should be flexed with 5%, 7.5%, 10% or 15% amplitude in water proofness testing of upper leathers.
Last updated: October 2026
Key Features
- Used for deciding whether a leather or group of leathers should be flexed with 5%, 7.5%, 10% or 15% amplitude
- The test machine is constructed so that any one of four amplitudes may be chosen for particular tests
- Penetration through most upper leathers is very slow if they are only put in contact with water without flexing
- Increasing the severity of flexing, for example the amplitude of the crank motion, greatly accelerates penetration
- Flexing all upper leathers to the same extent under-estimates the water proofness of thick leathers and over-estimates that of thin leathers
Technical Specifications
| Specification | Value |
|---|---|
| Purpose | Deciding the flexing amplitude for a leather or group of leathers |
| Amplitude choices | 5%, 7.5%, 10% or 15% |
| Effect of flexing | Larger crank amplitude speeds up water penetration |
About This Product
Water penetration through leather used for shoe uppers is judged by flexing the leather while it is in contact with water. Without flexing, water passes through most upper leathers very slowly, and a larger flexing amplitude speeds penetration up. Because thick and thin leathers behave differently, one flexing amplitude does not suit all of them, so a suitable amplitude is chosen for each leather or group of leathers before the test is run. Alongside supply within India, the Auxiliary Apparatus is offered for export to São Tomé and Príncipe, Benin, Bosnia and Herzegovina, Guyana and Albania.
Frequently Asked Questions
Q1. What is the Auxiliary Apparatus used for?
It is used for deciding whether a particular leather or group of leathers should be flexed with 5%, 7.5%, 10% or 15% amplitude.
Q2. Why is the flexing amplitude chosen for each leather?
If all types of upper leather are flexed to the same extent, the water proofness of thick leathers in wear is under-estimated and that of thin leathers is over-estimated.
Related: Leather Testing Equipment, Dynamic Water Proofness Tester, Spray Tester, Flexometer.
For a quotation on the Auxiliary Apparatus, contact School Lab Equipment India.