The ISO 105-B03:2017 standard specifies the test method for the weathering colour fastness of Spinning & weaving products under outdoor exposure. The purpose of this test is to evaluate the Color Stability of Spinning & weaving products under simulated outdoor environment conditions. Method The color change of Spinning & weaving products under long-term climate factors such as sunlight, wind and rain is detected by exposure to natural climate. This version updates the previous version of ISO 105-B03:1994, adding terms and definitions, and making adjustments to the test method. This standard provides an effective basis for the weathering resistance assessment of various Spinning & weaving products, especially those used outdoors.