equiviscous temperature

equiviscous temperature

[¦e·kwə¦vis·kəs ′tem·prə·chər]
(chemical engineering)
A measure of viscosity used in the tar industry, equal to the temperature in degrees Celsius at which the viscosity of tar is 50 seconds as measured in a standard tar efflux viscometer. Abbreviated EVT.

equiviscous temperature

The temperature at which a bitumen attains the proper viscosity for built-up roofing application.
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