ISO 2049 Petroleum products - Determination of colour (ASTM scale)
6 Preliminary examination of sample
6.1 Liquid petroleum products
Fill the sample container to a depth of 50 mm or more and observe the colour. If the Sample is not clear, heat it to a temperature 6 °C above the point at which the cloud or haze disappears, and determine the colour at that temperature. If the sample is darker than 8.0 colour (see table A.2) mix 15 volumes of the sample into 85 volumes of kerosine (4.2) and determine the colour of the mixture.
6.2 Petroleum waxes, including petrolatum
Heat the sample to a temperature 11 °C to 17 °C above the melting Point of the wax. If the sample is darker than 8.0 colour (see table A.2) mix 15 volumes of melted sample with 85 volumes of kerosine (4.2) brought to the same temperature, and determine the colour of the mixture at that temperature.
