Some materials appear to have considerable difference in gloss yet give comparable readings when measured with a glossmeter at one angle. These materials can be separated by measuring at a second angle and comparing the two readings.

Haze is defined by ASTM D 4039 as the difference between gloss at 60º and the gloss at 20º. Measurements are made by placing the instrument on the test surface and pressing a button. Two consecutive gloss readings are automatically taken and the calculated haze value is displayed. The Elcometer 6012 Novo-Haze™ can also be used as a 20º and 60º glossmeter.