sample was subsequently analyzed spectrometrically in the course of which it was possible to determine an integral solar absorptance of 95 5 u00b1 0 5 for an am 1 5 direct solar spectrum and a wavelength range of 350 2500 nm the thermal emissivity for a substrate temperature of 400 u00b0 c was determined to be 8 u00b1 2 alongside samples coated according to the method described above both samples having no second barrier layer below the metallic refection layer 21 and samples having a pure silicon oxide layer or a pure al 2 o 3 layer as a second barrier layer instead of a cermet layer according to the invention were coated after coating pull off tests using adhesive film strips u201c adhesive tape test u201d were carried out on the coatings in the case of the samples without a second barrier layer and in the case of the samples having a pure silicon oxide layer as second barrier layer detachment of the coating was ascertained at pull off values of lt 10 n in the case of samples having a pure al 2 o 3 layer it was possible to detect adhesion up to approximately 20 n but within 24 h cracking was manifested on account of high inherent stresses in the coating in the case of samples produced according to the method of the invention described above it was possible to carry out pull off tests up to 40 n without.