Centurys Hot Marking Chalk is a unique tool to mark onto red hot surfaces. It is widely used in industrial applications for coding & identification purposes. It makes very clear & bright markings on all kinds of metals, alloys, steel etc. and remains permanent up to 1400 degree Celsius (2500 F). The markings dont fade, char, peel or drip away from the surface. They can work on any kind of surface rough, scraped; smooth etc. The advantage of the chalk over other markers or chalks is that the marker can be used when the surface temperature of the object is very high. These chalks are used for marking metals for laser cutting, instant and inflatable markings at varied temperatures, rough surfaces of steel castings, metal forgings, stainless steel sheets, metal plates, concrete slabs, Stripped & Rolled Items, Ingots Billets etc.