In 1877 (Meiji 10), the technique of manufacturing glass beads was introduced to Izumi City, Osaka Prefecture, and the production of glass products began. "Izumi Glass" refers to "colored glass rods as raw materials and glass products such as sculptures made by lampworking, manufactured by craftsmen in Izumi City, Osaka Prefecture." Because it is made from soft glass, it is characterized by its rounded shape and warm texture, despite being glass.

• Technology/techniques/raw materials

  Technology/techniques/raw materials

  Technology/techniques
  1. In the manufacture of colored glass rods (including transparent ones), the molten glass mass is removed from the furnace and stretched into a long, thin shape on a wrench.

  2. Molding shall be carried out by the following techniques or methods:
  (1) Use a lamp.
  (2) Melting several bundled colored glass rods with a lamp, winding them onto a cutting rod, and shaping them.
  (3) Use a soldering iron, pliers, or tweezers as needed.

   

  raw materials
  1. The glass material shall consist of silica sand, stone powder, and soda ash, or materials equivalent thereto.

  2. Additives used for coloring, preventing deterioration, and lowering the melting temperature shall be metal oxides or materials of equivalent quality.