This standard specifies a wet test method for determining the moisture resistance of various fabric surfaces that have been or have not been treated for water repellency or water repellency. This standard is not suitable for determining the water permeability of fabrics, so it cannot be used to predict the rainproof permeability of fabrics.
GB/T 4745-1997 history
2012GB/T 4745-2012 Textiles.Testing and evaluation for water resistance.Spray test method
1997GB/T 4745-1997 Textile fabrics--Determination of resistance to surface wetting--Spray test