The ISO 105-G03:1993 standard specifies the colour fastness test method for Spinning & weaving products under atmospheric ozone. This method applies to different types and forms of Spinning & weaving products to evaluate their Color tolerance under normal temperature relative humidity of not more than 65% and high temperature and humidity conditions. This standard helps determine the color Stability of Spinning & weaving products under the influence of atmospheric ozone. If the sample shows sensitivity to this test, a colour fastness test for nitrogen oxides and combustion gas fumes is also required. This standard is part of the ISO 105 series and is a minor revision of the old version as its second edition.