Tests that are done to indentify leather quality for specific purpose

Strength property of leather

1. Tensile strength and percentage of elongation
2. Tearing strength
3. Stitch tearing strength
4. Tongue tearing strength 
5. Buckle tearing strength
6. Split tearing strength
7. Ball burst test
8. Distension and strength of grain by star burst test 
9. Distension and strength of grain by lastometer

Contents of this article:

• Purpose of leather quality tests
• Strength property of leather
• Upper and lining Leather
• Test for finish film
• Footwear/safety Footwear
• Leather  products
• sole leather
• Split tearing strength

Uppers and lining leather

1. Flexing endurance test
2. Water vapor permeability
3. Dynamic water proofness test 
4. Shrinkage temperature 
5. Dry and wet rub fastness

Test for finish film  

1. Adhesion of finish film
2. Wet and dry rub fastness
3. Cold crack resistance
4.  Heat resistance
5. Light fastness test
6. Test for bleeding
7. Water fastness
8. Resistance to solvent
9. Resistance to washing and cleaning
10. Resistance to dressing agent
11. Resistance to water stain
12. Moisture fastness
13. Resistance to plasticizer
14. Resistance to ageing

Footwear /Safety footwear   

1. Nail penetration for protective for mid- sole
2. Whole shoe top line test
3. Peel strength test of footwear 
4. Whole shoe flexing

Leather products 

1. Zipper test
2. Velcro test
3. Breaking load of threads
4. Lace to lace abrasion test
5. Lace to eyelet abrasion test

Sole Leather 

1. Sole abrasion test
2. Belt sole flexing test
3. Rib to insole
   

Determination of split tearing strength of supplied leather sample

Scope: 

This method can be used for any types of leather.

Principle: 

It can be defined as the load required in kg to continue the split the leather sample in 10mm thickness. It is leather to express the split tear strength in 1cm width instead of 1cm thickness.

Purpose: 

To know the cohesive strength of leather.

Norm: 

IUP-08

Sample size: 

75mm ✖ 25mm

Environmental condition:

Time = 48 hours

Temperature = 20 ± 2°C

Humidity = (65± 3)%

Sample Preparation: 

The specimen is 75mm long and 25mm width of a rectangle. Split the sample into two layer up to 25mm of the sample.

 Method:

Fix the two layer of the sample into the jaw of tensile testing machine. Apply load and continue splitting of sample.

Calculation: 

Split tearing strength = Split load ( kg)/width