For the future of people, nature and the earth

HARIO manufactures products in favor of the clean environment and the human ecology.

HARIO. This name means the "King of Glass." As the king of Glass, ever shining brilliantly, HARIO GLASS has addressed positively the environmental problems since early days. For example, HARIO selects only safe materials, uses only healthy 100%-natural resources, recycles limited resources, and never emits any industrial waste that may pollute the air or be harmful. We have always aimed at harmonization between and improvement of human beings and the nature.

Manufacturing process of glass
Raw materials, such as borax, are blown into the mixer for compounding. The compounding materials are carried into the melting furnace through the computer-controlled conveyer. Glass materials are melted with heat of about 1,600 degrees centigrade in an electric melting furnace. Around 20 tons of glass per day on average can be melted evening using glass itself as a conductor. Melted glass is formed by blowing, pressing, or pressing and blowing. Glass pieces are heated to about 580 degrees centigrade in a leer, and cooled down gradually to correct unevenness. This facilitates working. At the finishing process, the computer-controlled chill-cutting machine works the shape and the size of glass pieces for each product. An auto-printer machine prints graduations and patterns on finally worked products in up to four colors. A baking furnace called the decollating leer bakes and dries printed graduations or patterns printed on products. Accessories, such as ears and caps, are attached, and products are packed.  


Ball-shaped glass at 1,300 degrees centigrade of heat is extended evenly by a 16-head automatic forming machine. This machine produces 25 glass pieces in the basic form on average per minute by rotating the glass ball, and forming with the blowing pressures and centrifugal force.

Head-lens and headlights for automobiles are produced by pressing glass put in a mold. Press-and-blow-forming

Press-forming and blow-forming
are carried out in a row. This method has allowed us to manufacture heat-resistant screw-lid bottles.

Manual working
Complex or special parts, such as a glass ear and a siphon foot, are manually worked

Machine working