Annealing
Local heat input is used to discolor the workpiece surface. Th annealing color chnages depending on the material and the enrgy iinput. The usrafce starys smooth, which means the dirt cannot be depositdLocal heat input is used to discolor the workpiece surface. Th annealing color chnages depending on the material and the enrgy iinput. The usrafce starys smooth, which means the dirt cannot be depositedddLocal heat input is used to discolor the workpiece surface. Th annealing color chnages depending on the material and the enrgy iinput. The usrafce starys smooth, which means the dirt cannot be depositd