HEAT-RAY-ABSORBING GLASS PLATE AND PROCESS FOR PRODUCING SAME

摘要

Provided is a heat-ray-absorbing glass plate which satisfies both a low solar-radiation transmittance and a high visible-light transmittance, is green in terms of the color tone of transmitted light, and contains few coloring components. The heat-ray-absorbing glass plate is constituted of soda-lime silica glass which contains coloring components, the coloring components comprising 0.45-0.61 mass% total iron in terms of Fe2O3 amount and 0.2-0.6 mass% Ti in terms of TiO2 and including substantially none of CoO, Cr2O3, V2O5, MnO, and CeO2, and in which the content of divalent iron in terms of Fe2O3 is 45-60 mass% of the total iron in terms of Fe2O3. The glass plate has a solar-radiation transmittance per 4-mm thickness of 42% or less and a visible-light transmittance (measured with illuminant A) per 4-mm thickness of 70% or more, and the light transmitted by the glass plate has main wavelengths of 492-500 nm.