Patent ID: 7071134

Claim:
A method of manufacturing a soda-lime glass comprising zinc oxide and iron oxide (expressed as total iron oxide) wherein formation of nickel sulfide particles is suppressed in said glass, comprising adding a zinc compound to glass raw materials and melting said glass raw materials; wherein the soda lime glass is formulated by either: decreasing a content of the zinc oxide within a range of 0.006 to 2.0 wt. %, when the content of total iron oxide (in terms of Fe 2 O 3 ) in a glass is increased within a range of 0.005 wt. % to 0.06 wt. %, or increasing the content of the zinc oxide within a range of 0.006 to 2.0 wt. %, when the content of total iron oxide (in terms of Fe 2 O 3 ) in a glass is decreased within a range of 0.005 wt. % to 0.06 wt. %, thereby suppressing formation of nickel sulfide particles in the glass and whereby the soda-lime glass exhibits high transmittance with a visible light transmittance of 90.0% or higher on a basis of a 4.0 mm thick glass sheet.