Abstract: An apparatus for performing a weather resistance test on a composite material having a metallic, inorganic, or organic base member, and an organic material covering the base member. The apparatus includes a sample holding device disposed in a sample chamber for holding a sample of the composite material. An artificial light source irradiates light substantially in the ultraviolet light area to one surface of the sample. A dipping mechanism dips the sample in a corrosive ionized water, and dew condensation is formed through a temperature control device disposed in the sample holding device, working with a moisture source, for causing dew condensation in the surface of the sample. A cleaning device is provided for cleaning the surface of the sample, and steaming of the sample is performed through the use of a heating element disposed in the sample chamber, and the moistening means, for steaming the sample in an atmosphere of high temperature and high humidity.

Abstract: A method of and apparatus for weather resistance test comprising a process for washing the surface of samples with a cleaner which is added at least between a process for condensing moisture on the surface of the sample after ultraviolet radiation has been applied and the process for again applying ultraviolet radiation after the process for condensing moisture. Impurities adhered to the surface of the sample and substances extracted on the surface of the sample can be removed by washing with the cleaner so that the surface of the sample to which these impurities and substances are adhered intact can be protected from being baked in the ensuing ultraviolet radiation application process. Consequently, generation of spot patterns and excessive color change of the surface of the sample can be prevented.

Abstract: A weather resistance tester comprising:(a) a U.V. radiation source,(b) a reflector,(c) a shield panel provided in the opening of the reflector and closing the opening for transmitting U.V. radiation therethrough and substantially blocking water vapor,(d) a sample support,(e) temperature adjusting device,(f) a compartment having accommodated therein the above elements (a)-(e),(g) a recycling duct provided with a heat exchanger and blower,(h) a humidifier and(i) a control device for giving operational instructions to maintain a sample on the sample support at a predetermined temperature while the lamp is on and to subject the sample to a condensation condition while the lamp is off.