Temperature Indicators: Sticks, Crayons, Strips & Markers for Welding, Inspection & Operations {Precision temperature control distinguishes repeatable, spec-compliant work from guesswork. In fabrication shops, foundries, refineries, power plants and paint lines, teams need quick, visible confirmation that a surface has reached a specific heat before moving to the next step. https://ultimatesystem43.blogoscience.com/43173137/an-unbiased-view-of-temp-crayons-or-thermochalk