TYPE 5 TEMPERATURE INDICATING CRAYON 245C
Color Change 1: Orange Brown to Black at 245°C/473°F
Color Change 2: Black to Light Grey at 335°C/635°F
Color Change 3: Light Grey to White Buff at 505°C/941°F
Package: Box of 10 crayons
Minimum order: 1 box
To Use: Just mark the pre-heated surface with the crayon at the point where measurement is desired. An immediate color change indicates the measurement surface is higher than the crayon rating. A color change within 1-2 seconds means the temperature is within +/- 5°C of its rating. Color change after two seconds indicates the surface temperature is below the crayon rating.