Here is a link to a variety of methods-including the rack from aluminum foil you are asking about-it also discusses temperatures:
Why do you need am aluminum foil rack.? Use a cookie sheet with a cooking cooling rack on top. You don't have to waste money on aluminum foil. If you make bacon in the microwave use paper plates. Two underneath and one on top to keep the spatters down.
Here's a video https://lifehacker.com/boost-your-oven-baked-bacon-with-an-aluminum-foil-rack-1211445902
Jand: this may help. (It's how I cook roasts and chickens too!)
Thank you so much.I will try those also 👍
Fold the foil in bifold fold in a inch the with of the foil then fold the other way then the other way like an accordion then open slightly then place bacon on foil
Thank you so much👍