stained glass with improved color characteristics and colorimetrie, particularly in construction, glass panes for their production, and application of the same in the field of constructionin particular, for windows

摘要

Windows are claimed having, in the wavelength region 400-470nm; a light transmission coefft., constant within +10% the valve of which is 35-60% of the mean valve of the same coefft. in the wavelength range 600-700nm. The glass pref. has a luminous transmission factor (Y) of 45-60%, a total solar energy transmission factor of 35-55% a dominant wavelength of 578-583 nm and an excitation purity of 20-35(25)%. The solar energy transmission factor of the glass in the UV is 1/3 of that in the visible region. The window is made of glass of compsn. 68-72% SiO2, 0-4% Al2O3, 11-15% Na2O, 0-3% K2O, 7-12% CaO, 1-5% MgO, 0.2-0.8% Fe2O3, 0.002-0.01% Se, 0.001% CoO, 0.01% Cr2O3 and 0.02% Ni. Used as brown tinted windows for buildings for housing, offices or shops. Reduction of eye fatigue and heat transmission is achieved without sensible altering colour vison.