Patent ID: 6071840
Filing Date: 2000-06-06
Classification: C03C,Y10S

Abstract:
A dark green colored glass comprising 100 parts by weight of a matrix component of soda lime silicate glass, and, as coloring components, from 0.5 to 2.0 parts by weight of total iron calculated as Fe.sub.2 O.sub.3, more than 1.0 to 3.0 parts by weight of total titanium calculated as TiO.sub.2, from 0.003 to 0.02 part by weight of CoO, from 0 to 0.0008 part by weight of Se, from 0 to 0.05 part by weight of total chromium calculated as Cr.sub.2 O.sub.3, from 0 to 0.5 parts by weight of total vanadium calculated as V.sub.2 O.sub.5 and from 0 to 0.5 part by weight of total cerium calculated as CeO.sub.2, wherein the proportion of ferrous iron calculated as Fe.sub.2 O.sub.3, in the total iron calculated as Fe.sub.2 O.sub.3 is from 15 to 50%, and when said glass has a thickness of 5 mm it has a transmittance of light having a wavelength of 370 nm of at most 25%, a dominant wavelength of from 480 to 560 nm as measured by using illuminant C and an excitation purity of from 4 to 16% as measured by using illuminant C, and the ratio obtained by dividing the visible light transmittance (illuminant A) by the solar radiation transmittance is at least 1.3.