Light-transmitting decorative glass, decorative glass, and method and apparatus for manufacturing decorative glass

A decorative glass manufacturing method comprising the steps of:

• disposing a translucent glass plate having a thickness of 4 to 25 mm on a working table with a shock-absorbing material placed thereon;
• providing a radial crack in the translucent glass plate by impressing a point of a hard and sharp-pointed tool on a surface of the translucent glass plate, the tool point having a strength higher than glass;
• and
• repeating the providing step by impressing the tool point at a plurality of locations on the surface of the translucent glass plate to provide a plurality of cracks serving as dots that form a character or pattern.

A manufacturing apparatus for manufacturing decorative glass, the apparatus comprising:

• a flat working table with a shock-absorbing material placed thereon;
• a hard and sharp-pointed tool with a strength higher than glass, the tool having a tip end which has a point;
• and
• an arm holding the tool, the arm arranged to move the tip end instantaneously downward to a target mounted on the working table so that the tip end of the tool can impress a radial crack on a surface of the target.