GB/T 31122-2014 Liquid packaging base card board

GB/T 457-2008 Paper and board—Determination of folding endurance GB/T 1541-1989 GB/T 22363-2008 Paper and board—Determination of roughness(air leak methods)—Bendtsen method and print-surf method GB/T 22364-2008 Paper and board—Determination of resistance to bending GB/T 147-1997 Writing paper and certain classes printed matter—Untrimmed sizes GB/T 147-2020 Untrimmed sizes of printing, writing and drawing paper 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 451.3-2002 Paper and board—Determination of thickness 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 1540-2002 Paper and board-Determination of water absorption-Cobb 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 8941-2007 Paper and board—Measurement of specular gloss(20°45°75°) GB/T 8941-2013 Paper and board—Measurement of specular gloss 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 11680-1989 Hygienic standard of paper used for food packaging GB/T 26203-2010 Paper and board—Determination of internal bond strength(Scott type) GB/T 26203-2023 Paper and board—Determination of internal bond strength (Scott type) GB/T 24996-2010 Determination of deinking recycled fiber in paper GB/Z 147-2025 Course development guide for education about standardization—Automation standardization