温度・粘度
coefficient of expansion (COE)
Japanese: 熱膨張係数
How much does the length expand or contract with temperature changes? If you fuse glass together that doesn’t have similar values, it will crack. / Note: Glass is categorized into groups such as COE 90, 96, and 104. Be sure to check before mixing.
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The coefficient of thermal expansion (COE) is a value that indicates how much glass expands or contracts when the temperature changes. There are various COE series, such as COE 90, 96, and 104.
Unless the glass pieces have similar coefficients of thermal expansion (CTE), they will crack due to differences in expansion as they are fused together and cool. Always check the CTE before combining different types of glass.
This entry is written in Japanese by Rei Chikaoka and translated for readers outside Japan. If something reads oddly, the original is the source of truth.