... paper has an ignition temp of ~454 F per Ray Bradbury at least....

Actually, the name of his book is/was "451 Fahrenheit", not 454,
but you were close!

--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
NRA Life Member and Rifle, Pistol, & Home Firearm Safety Certified Instructor
Certified Instructor for the Kansas Concealed-Carry Handgun license