Not all baking tins are safe for the microwave. You need to read the sign or check the package that must have mention the same. If you can’t find the package box, you can go online and find the product online or search the brand. Mostly, you don’t have to this far. Just look at the bottom of the pan, and you will see three or more waves – if yes, then the pan is microwave safe. There may be other signs like dishwasher safe, food use, or freezer safe. You got to find the waves and confirm.