4 ms·
EDIT: I just found out that one of the ways to distinguish the earlier, borosilicate Pyrex is that the earlier versions are labeled in all-caps: PYREX.
by wyclif 6y ago
EDIT: I just found out that one of the ways to distinguish the earlier, borosilicate Pyrex is that the earlier versions are labeled in all-caps: PYREX.
- quercusa 6y agoThe new stuff is also noticeably greener (e.g., look down the side of a measuring cup so you are looking through as much glass as possible).