Green Project is able to propose a wide range of marking machines for the hot cast products; they are based on the SPRAY technology, consisting of a movable nozzle which sprays a special metal powder or melted wire to write the symbols, which appear bright and very well defined, as handwritten. The nozzle is moved by a robot or by a X-Y plotter. Typical applications are for slabs, blooms, billets up to 1200°C, key features are the excellent reliability and readability of the characters also from long distance (i.e. from the crane cabin). If scale is present on the surface, before marking it must be removed by a descaling unit, for which, mechanical and water jet solutions are available.