Assertion: turpentine | /r/HasProperty | desirable
Facets:
value: to keep the maximum temperature
type: PURPOSE
Source sentences:
text: Since discoloration increases both with the temperature of blowing and the period of time during which the turpentine is maintained near the maximum temperature of blowing, not only is it desirable to keep the maximum temperature at a point not substantially above 320" C. but also to restrict the time of blowing at the maximum temperature to about 30 minutes or so.