Heat-absorbing glass plate and method for manufacturing same

A heat-absorbing glass plate comprising iron, tin, selenium, cobalt and sulfur, wherein

• the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 55%,
• the content of Se as represented by mass % based on Se is from 0.0003 to 0.0020%,
• the content of total cobalt as calculated as CoO is, as represented by mass % based on oxides, from 0.0010 to 0.0060%.
• the content of total tin as calculated as SnO2 is, as represented by mass % based on oxides, from 0.02 to 0.3%,
• the ratio Tv/Te of the visible light transmittance Tv (by illuminant A, 2° visual field) as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate to the solar transmittance Te as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, is at least 1.5,
• the visible light transmittance Tv (by illuminant A, 2° visual field) is at most 65% as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, and
• the excitation purity Pe is at most 7% as defined in JIS Z8701 (1999) calculated as 4mm thickness of the glass plate.