Description
Leather Grain Crack Tester is intended to determine the propensity of the grain of a leather to crack during bending and suitable to test all kinds of sole leather.
1. Principle
A leather sample is bent around a series of numbered mandrels of decreasing diameter until either grain cracking occurs or the smallest mandrel has been used.
Grain crack index is calculated by multiplying test piece thickness by mandrel number.
2. Leather Grain Crack Specification
| Model | UI-FT74 |
| 8 Metal mandrels | diameter: 61.7±0.1/35.0±0.1/23.6±0.1/17.2±0.1/13.18±0.03/10.4±0.1/8.3±0.1/6.8±0.1）mm |
| Metal roller | （25±2）mm |
| sample size | （150±5×25±2）mm |
| standard | SATRA TM48 |
Additional information
| 1. Know More | Shoe Heat Resistance Tester is to test shoe outsole and upper hot contact resistance ability especially for safety shoe. Heat Resistance Test Method includes ISO 20344, SATRA TM49, EN 344 and etc. |
|---|---|
| What Is Fabric Pills | As described in ISO 12945-1, “pills are formed when fibres on a fabric surface “tease out” and become entangled during wear”. The level of pilling is determined by the rate of a) fibre entanglement leading to pill formation; b) development of more surface fibre; c) fibre and pill wear-off. The rate of these process depend on the fibre, yarn and fabric properties. |
