A colored glass, a surface of which is roughened in whole or in part. In the colored glass, an average value of gloss values measured at 9 points in the surface thereof at an incident angle of 60° in accordance with JIS 28741 (1991) is 30 or less, a ratio of a difference between a maximum gloss value and a minimum gloss value to the maximum gloss value is 20% or less, and a minimum value of visible-light transmittance at a thickness of 0.8 mm is 70% or less.
1. A colored glass, comprising
at least one coloring component selected from the group consisting of oxides of Co, Mn, Fe, Ni, Cu, Cr, V, Bi, Se, Ti, Ce, Er and Nd,
wherein
a surface layer of the colored glass is roughened in whole or in part to obtain a roughened surface layer,
an average value of gloss values measured at 9 points in the roughened surface layer at an incident angle of 60° in accordance with JIS Z8741 (1991) is 30 or less,
a ratio of a difference between a maximum gloss value and a minimum gloss value to the maximum gloss value is 20% or less, and
a minimum value of visible-light transmittance at a thickness of 0.8 mm is 70% or less.
2. The colored glass according to claim 1 , wherein the roughened surface layer has a surface roughness Ra measured in accordance with JIS B0633 (2001) of from 0.2 to 1 μm.
3. The colored glass according to claim 1 , wherein a maximum value of an absorption coefficient to a light having a wavelength of 380 to 780 nm is 0.1 mm −1 or more.
4. The colored glass according to claim 1 , comprising
a compressive stress layer in the roughened surface layer.
5. The colored glass according to claim 1 , wherein a total content of the at least one coloring component is from 0.1 to 7%.
6. The colored glass according to claim 1 , which is configured to enclose an electronic device.
7. The colored glass according to claim 6 , wherein the electronic device is a portable electronic device.
8. A portable electronic device, comprising
the colored glass according to claim 1 ,
wherein the colored glass is configured to enclose the portable electronic device.
9. A method for producing the colored glass according to claim 1 , the method comprising:
roughening the surface layer of the glass in whole or in part to obtain the roughened surface layer; and
etching the roughened surface layer.
10. The method according to claim 9 , wherein said roughening comprises
polishing the surface layer using an abrasive or sandblasting the surface layer.
11. The method according to claim 9 , wherein said roughening comprises
dipping the surface layer in an etching liquid.
12. The method according to claim 9 , wherein said etching comprises
dipping the roughened surface in an etching liquid containing at least one selected from the group consisting of hydrofluoric acid, hexafluorosilicic acid and buffered hydrofluoric acid.