Assertion: turpentine | /r/HasProperty | heated in the practice of the invention
Facets:
Source sentences:
text: In the practice of the invention, turpentine is heated and blown with air at an elevated temperature adapted to make the turpentine readily oxidizable by free oxygen and cause polymerization, as evidenced by thickening, but below the temperature of objectionable darkening of the turpentine, Ihave found that particularly good results are obtained when the temperature of treatment'of the turpentine is between about 240 and 320 C. and air is passed in finely divided form through the heated turpentine for about 20 to 60 minutes or until the rate of absorptio of oxygenby the turpentine becomes relatively slow.