Assertion: rubber | /r/HasProperty | treated with sulfur
Facets:
value: during the vulcanization process
type: TEMPORAL
Source sentences:
text: How It Works states that during the vulcanization process, rubber is treated with sulfur while being heated.
text: For the next few years he worked with Nathaniel M. Hayward (1808–65), a former employee of a rubber factory in Roxbury, Mass., who had discovered that rubber treated with sulfur was not sticky.