GB/T 22834-2008 Envelope paper

GB/T 457-2008 Paper and board—Determination of folding endurance GB/T 460-2008 Paper—Determination of the sizing value GB/T 450-2002 Paper and board—Sampling for testing GB/T 450-2008 Paper and board—Sampling for testing and identification of machine and cross direction,wire side and felt side GB/T 451.1-2002 Paper and board—Determination of size and deviation GB/T 451.2-2002 Paper and board—Determination of grammage GB/T 451.2-2023 Paper and board—Part 2:Determination of grammage GB/T 454-2002 Paper—Determination of bursting strength GB/T 454-2020 Paper—Determination of bursting strength GB/T 456-2002 Paper and board—Determination of smoothness (Bekk method) GB/T 462-2003 Paper and board—Determination of moisture content GB/T 462-2008 Paper,board and pulp—Determination of moisture content of analytical sample GB/T 462-2023 Paper, board and pulps—Determination of moisture content of analytical sample GB/T 1541-2007 Paper and board—Determination of dirt GB/T 1541-2013 Paper and board—Determination of dirt GB/T 1543-2005 Paper and board—Determination of opacity (paper backing)—Diffuse reflectance method 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 7974-2002 Paper, board and pulp-Measurement of brightness—Diff/Geometry GB/T 7974-2013 Paper,board and pulps—Measurement of diffuse blue reflectance factor—D65 brightness(Diff/ Geometry,Outdoor daylight conditions) GB/T 7975-2005 Paper and board—Determination of color(diffuse reflectance method) GB/T 10342-2002 Paper—Package and mark GB/T 10739-2002 Paper, board and pulps—Standard atmosphere for conditioning and testing GB/T 10739-2023 Paper,board and pulps—Standard atmosphere for conditioning and testing GB/T 12914-1991 Paper and board—Determination of tensile properties—Constant rate of elongation method GB/T 12914-2008 Paper and board—Determination of tensile properties GB/T 12914-2018 Paper and board—Determination of tensile properties—Constant rate of elongation method(20 mm/min) GB/T 22365-2008 Paper and board—Determination of printing surface strength