Tenma Kiriko's Kamaboko carving (U-shape carving) is a process of shaving the glass into a U-shape, which gives the surface of the glass a concave lens shape.
When the surface is polished to a mirror finish, the pattern carved on the bottom of the glass is reflected on the inside of the glass by the refraction of the liquid when a drink is poured, creating a beautiful kaleidoscope-like pattern.

🎥 Cooperation
Workshop: Tenmakiriko Corporation / Workshop RAU
Address: Ura Bldg. 1F, 1-11-8 Doshin, Kita-ku, Osaka City
TEL : 06-6357-9362

Official website:
https://temmakiriko.com/

Instagram:
  / temmakiriko_official  

Google Map:
https://maps.app.goo.gl/6DwxkQcsp9SnC...

Directly managed store and bar: TEMMA KIRIKO UX
https://maps.app.goo.gl/3pgbdVSJTf9vx...

🎬 Chapter
0:00 Exterior view of the workshop
00:15 Dividing the glass
Basic lines are drawn on the surface of the glass to serve as a guide for cutting. The lines drawn will be the center line for cutting, so a device called an indexer is used to draw accurate lines.
1:29 Side shaving
A U-shaped diamond wheel attached to the grinder is rotated to grind while applying water. The cut surface is smoothed out by starting with a coarse grit and gradually moving to a very fine grit.
9:42 Bottom grinding
12:37 Polishing
A natural abrasive called "polishing sand" is dissolved in water and applied to a disk-shaped wooden board (cork board) while polishing the shaved surface to make it transparent.
14:16 Buffing
Felt or cloth buffs attached to the grinder are rotated, and cerium oxide dissolved in water is applied to the buffed surface to complete the polishing process.
16:08 Directly-managed store & BAR
16:26 Reflection of the pattern when a drink is poured
16:46 Ending