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See Chinese contents: GB/T 2893.4-2013 GB/T 2893.4-2013: Graphical symbols -- Safety colours and safety signs -- Part 4: Colorimetric and photometric properties of safety sign materials
This Part of GB/T 2893 specifies the relevant requirements and test methods for the colorimetric and photometric attributes of the colors of safety signs, which are used in workplaces and public places. It provides colorimetric and photometric specifications, for the safety colors and contrast colors, which are specified in GB/T 2893.1-2013.
