ISO 4630:2015规定了使用颜色测量仪器，通过加德纳色标估算光学透明、黄色/棕色液体产品颜色的方法。该方法使用附录A中所述的加德纳色标。 适用于干燥油脂、清漆、脂肪酸溶液、聚合脂肪酸、树脂、妥尔油、妥尔油脂肪酸、松香及相关产品。如果对其他产品进行测试，结果可能无效。 所描述的方法提供了一种比人眼视觉样品比较更精确的测量加德纳颜色的方法。 适用于颜色从Gardner 1到Gardner 18的产品。加德纳标尺不适用于颜色深于18的产品。对于颜色比Gardner 1浅的产品，ISO 6271中规定的方法适用。

ISO 4630:2015 specifies a method for estimating the colour of optically clear, yellow/brownish coloured liquid products by means of the Gardner colour scale using colour-measuring instruments. The method uses the Gardner colour scale described in Annex A. It is applicable to drying oils, varnishes and solutions of fatty acids, polymerized fatty acids, resins, tall oil, tall oil fatty acids, rosin and related products. The results might be invalid if other products are tested. The method described provides a more precise way of measuring Gardner colour than a visual sample comparison using human eyes. It is applicable to products having colours from Gardner 1 to Gardner 18. The Gardner scale is not applicable to products with colours darker than 18. For products with colours lighter than Gardner 1 the method specified in ISO 6271 applies.