温度・粘度
viscosity
Japanese: 粘度
A measure of the “softness” of glass. As temperature rises, viscosity decreases, and the glass becomes more fluid. Virtually all phenomena in kiln work are determined by the value of this viscosity. / Note: The unit is Pa·s. It is conventionally discussed in terms of the logarithm, log η.
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Viscosity is a measure of a glass’s “softness” or “resistance to flow,” and its unit is Pa·s (pascal-seconds). It is conventionally expressed as log η, which is the natural logarithm of η.
As the temperature rises, viscosity decreases, and the glass becomes more fluid. Virtually all phenomena that occur during kiln work are determined by the relationship between viscosity and temperature.
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.