Excuse somewhat OT. But knowledgeable group here may be able to help/ comment.
We have a very shallow ex microwave tray/dish just over 12 inches square. Doesn't fit any other m.waves we have.
Moulded into the glass (Which we assume is some sort of Pyrex, heat resistant glass?) is "For microwave use only".
Before trying it in a conventional electric oven, anyone have any idea why this would not be suitable?
BTW tray does have a slight 'spall' (chip) which might be the point of weakness if it does shatter and send burst glass all over the conventional oven!
Have never tried it before and after running a small catering/ cafeteria company for some 30+ years we never did shatter anything in a microwave oven.
Thanks for any insight.