The ASTM D1544-2018 standard is used to measure the Color of clear liquids and is suitable for drying oils, varnishes, fatty acids and Resin solutions. This method determines the Color value of liquids by comparing it with the standard Glass Formula Guide. This method requires the user to have normal color vision and emphasizes the use of SI units as the standard. The standard does not address all safety issues in use, and the user needs to establish appropriate safety, health and environment practices.