Leather is through depilation, tanning and other physical, chemical processing obtained by denatured non-perishable animal skin.Leather is made up of natural protein fibers tightly woven in three-dimensional space, and its surface has a special grain layer with natural grain lines and luster, which makes it very comfortable to feel.

Leather is through depilation, tanning and other physical, chemical processing obtained by denatured non-perishable animal skin.

Testing range of leather:

1.Raw material skin: cowhide, goat skin, sheep skin, pig skin, raccoon skin, rabbit skin, fox skin, mink skin, etc.

2. Finished leather: upper leather, shoe lining leather, garment glove leather, sofa leather, automobile cushion leather, luggage leather, special finished leather, etc.

3. Artificial leather (artificial leather) : PVC artificial leather, polyamide artificial leather, polyolefin artificial leather, polyurethane artificial leather, polyolefin leather, nylon leather, synthetic leather, etc.

4. Leather garment: fur coat, leather jacket, leather cap, fashion leather, special/professional leather garment, etc.

5. Fur products: fur plates, fur garments, fur hats, fur toys, mink products, fox products, etc.;

6. Leather chemical raw materials: cationic dyes, sulphur dyes, VAT dyes, metal complex dyes, ice dye, solvent dyes, direct dyes, acid dyes, disperse dyes, reactive dyes, basic dyes, special/professional dyestuff, surface active agent, degreasing agent, chrome tanning agent, retanning agent, auxiliary tanning agent, dyeing auxiliaries, fatliquoring agent, coating materials, fur special materials;

7. Leather accessories/hardware: molded sole, artificial leather, synthetic leather, heel, last, shoelace, leather hardware accessories, leather accessories, etc.;

8. Ball leather: Leather basketball, leather volleyball, leather football, special/professional leather ball, etc.

Artificial leather

Test items:

1. Physical performance test: tensile strength, elongation, tearing strength, tensile strength, shrinkage temperature, disintegration height, disintegration strength, leather apparent density, coating folding fastness (normal/low temperature), bottom leather fastness, water absorption, heat resistance, oil resistance, friction resistance, fur flame retardant;

2. Chemical performance test: pH value, hexavalent chromium content, formaldehyde content, banned azo dye, odor, volatile content of fur, moisture content and volatile content of leather;

3. Color fastness: rubbing fastness, water fastness, sweat fastness, light fastness;

4. Content determination: formaldehyde content, hexavalent chromium, azo, heavy metal, PCP, TeCP, OPP, free fatty acid content, organotin compounds;

5. Material identification: Material identification (leather, fur/artificial leather/synthetic leather, etc.);

6. Analysis items: component analysis, toxic and harmful substances testing, environmental protection testing, azo testing.

Leather testing

Test standard：

GB/T 16799-2008 Inspection of furniture with leather；

GB/T4689.21-1996 Method for determination of water absorption of leather；

GB/T4689.22-1996 Method for determination of air permeability of leather；

GB/T4690-1984 Division of finished leather parts；

GB/T4689.20-1996 Method for determination of fastness to adhesion of leather coatings；

GB/T 19940-2005 Methods for determination of hexavalent chromium ions in powder chrome tanning agents；

GB/T 19941-2005 Determination of formaldehyde in leather；

GB/T 19942-2005 Determination of azo dyes banned for chemical tests on leather and fur；

GB 20400-2006 Limit of harmful substances in leather and fur；

GB/T 22807-2008 Determination of hexavalent chromium in leather and fur；

GB/T 22808-2008 Determination of pentachlorophenol in leather and fur；

GB/T 22886-2008 Color fastness to water stain；

GB/T 22888-2008 Physical and mechanical testing of leather - Determination of low - temperature embrittlement temperature of surface coatings；

GB/T 22889-2008 Determination of coating thickness for leather surfaces；

GB/T 22890-2008 Determination of water resistance of soft leather.

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