GB/T 29291-2012 Button general technical requirements and testing methods—Zinc alloy buttons

GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB 250-1995 Gray scale for assessing change in colour GB/T 250-2008 Textiles—Tests for colour fastness—Grey scale for assessing change in colour GB 251-1995 Gray scale for assessing staining GB/T 251-2008 Textiles—Tests for colour fastness—Grey scale for assessing staining GB/T 1720-2020 Circle-drawing test of coating films GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 3921-2008 Textiles—Tests for colour fastness—Colour fastness to washing with soap or soap and soda GB/T 3921.1-1997 Textiles—Tests for colour fastness—Colour fastness to washing:Test 1 GB/T 3921.2-1997 Testiles—Tests for colour fastness—Colour fastness to washing:Test 2 GB/T 3921.3-1997 Textiles—Tests for color fastness—Color fastness to washing:Test 3 GB/T 3921.4-1997 Textiles—Tests for color fastness—Color fastness to washing:Test 4 GB/T 3921.5-1997 Textiles—Tests for color fastness—Color fastness to washing:Test 5 GB/T 5711-1997 Textiles—Tests for colour fastness—Colour fastness to dry cleaning GB/T 5711-2015 Textiles—Tests for colour fastness—Colour fastness to drycleaning using perchloroethylene solvent GB/T 6462-1986 Metallic and oxide coatings—Measurement of coating thickness—Microscopical method GB/T 6462-2005 Metallic and oxide coatings—Measurement of coating thickness—Microscopical method GB/T 6543-1986 Corrugated box GB/T 6543-2008 Single and double corrugated boxes for transport packages GB/T 7069-1997 Textiles—Tests for colour fastness—Colour fastness to bleaching:Hypochlorite GB/T 28490-2012 Button classification and terminology QB/T 3826-1999 Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products Neutral salt spraying test(NSS) GB/T 6543-2025 Single and double corrugated boxes for transport packages GB/T 191-2025 Graphical symbols marking for handling and storage of packages GB/T 6462-2025 Metallic and oxide coatings—Measurement of coating thinckness—Microscopical method