Patent ID: 6455452
Filing Date: 2002-09-24
Classification: C03C,Y10S

Abstract:
A bronze colored, infrared and ultraviolet radiation absorbing glass composition having a composition comprising:a base glass portion comprising: SiO266 to 75 percent by weight,Na2O10 to 20 percent by weight,CaOâ€‚5 to 15 percent by weight,MgOâ€ƒ0 to 5 percent by weight,Al2O3â€ƒ0 to 5 percent by weight,K2Oâ€ƒ0 to 5 percent by weight,and a colorant portion consisting essentially of:total iron0.7 to 2.2percent by weight,FeO0.15 to 0.5percent by weight,Se3 to 100PPM, andCoO0 to less than 100PPM,the glass having a luminous transmittance (LTA) of up to 60 percent, and the color of the glass characterized by a dominant wavelength in the range of 571 to 590 nanometers and an excitation purity of greater than 12 to 75 percent for a thickness of 0.160 inches.