The DIN EN ISO 2814-2006 standard specifies a method for comparing the difference in hiding power (contrast ratio) between Paints and varnishes of the same type and Color. The standard applies to white or light Paints films with a reflectance greater than 40%, applied on black and white substrates, and film Film thickness is approximately equal. The contrast ratio is calculated by measuring the reflectance of the film on black and white substrates to evaluate the hiding power of Coatings.