Flake glass and process for producing the same
AssigneeNippon Sheet Glass Company Limited 1-7 Kaigan 2-Chome
InventorsKosuke Fujiwara, Makoto Umino, Akihiro Koyama
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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 μm. 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.
Claims21
A glass flake, comprising a glass composition, the glass composition comprising a transition metal oxide and allowing 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 μm.
A method of manufacturing a glass flake, comprising heat-treating a glass flake containing Fe to change a valence of at least part of the Fe and thereby to vary color tone of the glass flake.
A method of manufacturing a glass flake, comprising heat-treating a glass flake containing Fe to form oxide crystals of the Fe in the glass flake.
Dependencies are inferred from the claim text.