Foreword: When the indicators of the four chemicals that are easy to exist in the real leather and are closely related to ecology are lower than the limit requirements, such leather can be accepted by EU countries and is also known as the real "ecological leather" (that is, environmentally friendly leather). The four chemical indicators are: hexavalent chromium, banned azo dyes, pentachlorophenol and free formaldehyde.
Common leather inspection items:
Chemical performance tests: pH, hexavalent content, formaldehyde content, prohibited azo dyes, odor, fur volatile content, leather moisture content and volatiles.
Color fastness test: friction color fastness, water stain color fastness, sweat stain color fastness, light fastness
Determination of harmful substance content: formaldehyde content, hexavalent chromium, azo, heavy metals, PCP, TeCP, OPP, free fatty acid content, organotin compounds
Leather material identification: material identification (leather, fur/artificial leather/synthetic leather, etc.).
Leather analysis items: composition analysis, toxic and harmful substances testing, environmental protection testing, azo testing.
The latest testing standards for leather:
GB/T 16799-2018 Leather for furniture
GB/T 4689.21-2008 Leather Physical and mechanical test Determination of static water absorption
QB/T 2799-2006 Leather breathability measurement method
QB/T 2800-2006 Distinction of finished leather parts
GB/T 39452-2020 Leather Physical and mechanical test Determination of coating adhesion fastness
GB/T19940-2005 Method for determining hexavalent chromium ions of powdered release agent
GB/T19941-2005 Determination of formaldehyde content in leather and fur chemical tests
GB/T 19942-2019 Determination of azo dyes is prohibited in leather and fur chemical tests
GB 20400-2006 Limit of harmful substances in leather and fur
GB/T 22807-2019 Leather and fur Chemical test Determination of hexavalent chromium content: spectrophotometry
GB/T 22808-2021 Determination of pechlorophenol content in leather and fur chemical tests
GB/T 22886-2008 Leather color fastness test water stain color fastness
GB/T22888-2021 Determination of low temperature brittle crack temperature of surface coatings in leather physical and mechanical tests
GB/T22889-2021 Determination of surface coating thickness for physical and mechanical tests of leather
GB/T22890-2008 Determination of waterproof performance of soft leather in physical and mechanical tests of leather