In contrast to accelerated weathering with xenon arc lamps, UV fluorescent lamps (UVA-340, UVB-313) are used as a light source. These lead to an even greater acceleration of decomposition processes of organic compounds. A heated water reservoir simulates formation of dew by condensation of water on the sample surface. After exposure to UV light and water condensate in cyclic alternation, the colour and gloss stability of organic and metallic surfaces as well as textiles are tested.
