GB/T 37773-2019 Enamel coatings applied to steel for writing surfaces

GB/T 9989.1-2015 Vitreous and porcelain enamels—Determination of resistance to chemical corrosion—Part 1:Determination of resistance to chemical corrosion by acids at room temperature GB/T 13790-2008 Cold rolled low carbon steel sheets and strips for vitreous enamelling GB/T 30199-2013 Vitreous and porcelain enamels—Determination of scracth resistance of enamel finishes GB/T 31567-2015 Regenerative,enamelled and packed panels for air-gas and gas-gas heat exchangers GB/T 308.1-2013 Rolling bearings—Balls—Part 1:Steel balls GB/T 4956-2003 Non-magnetic coatings on magnetic substrates—Measurement of coating thickness-Magnetic method GB/T 9754-1988 Paints and varnishes—Measurement of specular gloss of non-metallic paint films at 20°, 60°and 85° GB/T 9754-2007 Paints and varnishes—Determination of specular gloss of non-metallic paint films at 20°,60°and 85° GB/T 11186.1-1989 Methods for measuring the color of paint films—Part 1:Principles GB/T 11186.2-1989 Methods for measuring the color of paint films—Part 2:Colour measurement GB/T 11186.3-1989 Methods for measuring the color of paint films—Part 3:Calculation of color differences GB/T 9754-2025 Paints and varnishes—Determination of gloss value at 20°、60° and 85° GB/T 4956-2025 Non-magnetic coatings on magnetic substrates—Measurement of coating thickness—Magnetic method

ISO 28762:2010