I just scored a few bargain pieces of Pillivuyt and Apilco bakeware at a closeout sale. I can't find any information about safe maximum oven temperatures for these items on-line. They just seem to say "oven, dishwasher, and microwave safe". Does anyone have any max recommendations? I think 450 degrees would be about the hottest oven temp I would use with these pieces. I also assume that these cannot stand a broiler or stove top, of course.