Glass Balls

Our glass balls are classified into soda glass balls and optical glass balls. Based on the growth of the plastic materials, the existence value of the glass balls has been declining. However, recent environmental and recycle issue has triggered the review of the glass material. glass-p01.jpg

Types of Glass Balls


Soda Glass balls
Soda glass is the most common glass and is used in a wide variety of items such as window glass, glass jars, dishes and many other glass products. Soda glass balls are used for plastic bearings, churning balls in sealed containers, etc.

Characteristics of Soda Glass
Characteristics Unit
Gravity g/cm3 2.5
Hardness Mnoop hardness 5 - 6.5
Softening Temperature °C 720 - 730
Thermal Conductivity Cal/m•h°C 0.68
Linear Expansion Coefficient x10–6/°C 8.5 - 9.0
Compressive Strength kg/cm2 6000 - 12000


Optical Glass balls
Based on the growth of opto-electronics and optic fiber, optical glass are used as the ball lens for the optical branching filters and optical insertion devices. Optical glass balls are manufactured by the glass with various compositions for the optical usages. One of the characteristics of optical glass is constant purity. It does not have the defects such as air bubbles and striae that prevent the optical transmission and refraction. Optical glass balls are used in a wide variety of areas such as ball lenses, sensors, joints for optic fiber, blanks of aspheric lenses.

Optical Glass Comparison Chart
Characteristics/Form BK-7 EC-GLASS B270
Refractive Index 1.516 1.523 1.523
Gravity 2.52 2.50 2.55

We introduce products and spheres etc we made in the past with photographs. I think that you can see that it is producing various types of spheres.