heat - Why must the oven be preheated for a Pyrex glass pan

heat - Why must the oven be preheated for a Pyrex glass pan

This Pyrex glass safety label says "Always preheat oven". Any idea why?

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Wholesale cheap heat resistance rectangle pyrex glass baking dish for food warmer manufacturers

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Pyrex - Pyrex, Easy Grab - Baking Dish, 2 Quart, Shop

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Pyrex Easy Grab 3 qt. Glass Baking Dish 1085782 - The Home Depot

Bake, take and store food in these thoughtfully designed dishes.

Easy Grab® 4-piece Glass Bakeware Set with Red Lids

Wholesale cheap heat resistance rectangle pyrex glass baking dish for food warmer manufacturers

TIL that Pyrex can't be trusted in an oven over 425 degrees. : r/mildlyinfuriating

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Is Pyrex Oven Safe? How To Use Your Pyrex Dishes Safely