Although paper ignites at around 480 degrees Fahrenheit, it gets far hotter once it's burning. The temperature at the center of a paper fire is 1,500 degrees Fahrenheit, give or take a couple hundred. The tips of the flames themselves are usually between 600 and 800 degrees.
Can you put the cardboard from a digiorno pizza in the oven?
If you don't have a stone, you can slide the pizza directly on the middle rack of your oven to cook. Only cook one pizza at a time in the oven. Slide pizza only on rack or stone, (don't put the cardboard circle in the oven). Save cardboard circle to take out pizza if you cooked it directly on the rack.
What temperature should I reheat pizza in the oven?
Or heat a skillet on medium-high for a minute, add the pizza, cover loosely with a lid, and cook 2 to 3 minutes. For larger amounts, heat a foil-lined cookie sheet in a 450°F oven until hot (high heat makes the crust crispy). Arrange slices on the sheet and heat 10 minutes, or until the cheese is bubbly.