Abstract: The present invention provides a glass flake having sufficiently high visible-light absorptivity. The glass flake of the present invention includes a glass composition that contains a transition metal oxide such as an iron oxide and that allows the glass flake to have a visible-light transmittance of 85% or lower measured with an A light source when the glass flake has a thickness of 15 ?m. In this glass composition, it is preferable that the content of Fe2O3 (T?Fe2O3) in terms of the total iron satisfies the following formula, expressed in mass %: 10<T?Fe2O3?50.

Abstract: A method for manufacturing a float glass comprising the steps of feeding molten glass onto molten metal having a specific gravity greater than the molten glass and contained in a float glass making furnace and flowing the molten glass to the downstream side with the molten glass being floated on the surface of the molten metal, thereby forming the molten glass into a shape of plate. A foreign-substance entrapping metal under its molten state to contact an upper surface of the molten glass on the molten metal, the foreign-substance entrapping metal having a melting point lower than the softening point of the glass and being capable of entrapping either a precipitate which is precipitated on the upper surface of the molten glass or an attachment which is formed thereon.

Abstract: The present invention provides a glass flake having sufficiently high visible-light absorptivity. The glass flake of the present invention includes a glass composition that contains a transition metal oxide such as an iron oxide and that allows the glass flake to have a visible-light transmittance of 85% or lower measured with an A light source when the glass flake has a thickness of 15 ?m. In this glass composition, it is preferable that the content of Fe2O3 (T-Fe2O3) in terms of the total iron satisfies the following formula, expressed in mass%: 10<T-Fe2O3?50.

Abstract: A washing method for removing oily soil from an object stained therewith by contacting the object with a non-flammable washing agent composition comprising 0.001 to 30 parts of a fluorine-free absorbent which can absorb and capture oily soil and not less than 70 parts of perfluorocarbon liquid to remove the soil from the object.