This part of GB/T 3609 specifies the structure, optical property, non-optical property, test method, inspection rules, packing, marking, storage and transport for the automatic welding filter.
This part is applicable to the automatic welding filter on the welder's face shield to protect eyes against the harmful strong light, ultraviolet and infrared radiation.
Foreword I
1 Scope 1
2 Normative References 1
3 Terms and Definitions 1
4 Structure 4
5 Technical Requirements 4
6 Test Methods 9
7 Packing, Marking, Storage and Transport 13
Appendix A (Normative) Calculation of Shade Number 14
Appendix B (Informative) Shade Number Selection at Different Operating Environment 17
Appendix C (Informative) Measuring Device for Reduced Luminance Coefficient of Diffused Light 21
Bibliography 23
