Patent ID: 7353722

Claim:
A method for evaluating the weathering-dependent ageing of a sample, comprising: exposing the sample in an enclosure to natural or artificial weathering, and contactlessly measuring a surface temperature of the sample during the weathering by measuring a black-body radiation of the sample surface and determining the surface temperature therefrom on the basis of an assumed or experimentally determined value of the radiation emissivity of the sample, wherein the sample is moved through space within the enclosure during the weathering, the black-body radiation is measured by using a pyrometer aimed at a stationary region of space and measuring the black-body from the stationary region of space, and the sample identified from an angular position of the holding frame is moved through the interior of the enclosure during the weathering in a way that the sample surface passes periodically through the stationary region of space and allowing the pyrometer to measure the black-body radiation during the passage time of the sample through the stationary region.