the.com/white hot
The temperature where metal forgets its color and starts impersonating the sun.
Hotter than redWhite heat tops 1300°C, well past glowing red
Color ladderMetal climbs from red to orange to blinding white
Blackbody trickAll colors emit at once, blending into white
Smith's eyeOld blacksmiths judged heat by hue alone
Star mathWhite stars run hotter than our yellow sun