The purpose of this standard is to establish a general method for determining the dynamic viscosity of paints, varnishes and related products at strain gradients between 5 000 and 20 000 s. for approximately equal deformation gradients. The measurement will be carried out at a certain temperature, which will be 23 ± 0.2° C, provided that nothing else is specified. The value obtained is of interest to predict the behavior of the product during the test. initial period of its application by brush, not providing any information about the transformations that the film undergoes, once applied, while the evaporation of the solvent occurs. The method is applicable to both products with Newtonian and non-Newton behavior. -niano. Due to the narrow opening between the mobile and static parts of the viscometers used, the results obtained will be more reproducible for paints with low grinding fineness values, as determined in the UNE 48-174 standard.