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://apexblock43.goabroadblog.com/35797412/what-does-metal-surface-temperature-measuring-chalks-or-crayons-or-sticks-mean-how-it-will-be-helpful-to-you