The ISO 2811-1: 2016 standard specifies the method of operation for determining the density of coatings such as Paints and varnish by the Specific Gravity bottle method. This method is suitable for materials of low to medium viscosity, excluding high viscosity coatings. The standard specifies the Precision requirements for analytical balances and thermometers, and clearly specifies the requirement that the sample is free of bubbles. The document also corrects spelling errors in the Specific Gravity bottle and details the steps for using the Specific Gravity bottle. The purpose of the standard is to ensure the conformity and accuracy of test results, providing consistent operating practices for density determination of Paints and varnish.