Temperature Indicating Crayon is designed to change physical appearance at pre-engineered temperature. This Crayon provides a simple faster way to ascertain surface temperature during a process. Thermo Chalks is the manufacturer of Temperature Indicating Crayon.
Thermo Chalks supplies various types of indicating crayon. The Temperature Indicating Crayon is recommended to use three sticks. One rated below the desired surface temperature, other nearest to the desired temperature & the third slightly higher. So that the job can be handled within set limits.
