Black markings are ideal for rust-free stainless steels, titanium, copper and brass. This structured surface reduces the amount of light that is reflected, and the result is a deep, matt blackening of the marking, which appears the same when viewed from any angle. 03 mm deep in the metal surface.īlack marking is a marking process that produces very high-contrast, dark markings. The color change is achieved through localized material heating only. The material surface remains even during annealing because nothing is removed from it. The color depends on the temperature of the heated layers. Generally, the oxide layer is black, but it can also have other annealing colors. steels and titanium, but not aluminum or nonferrous metals.
The usage of laser technology and the nameplate engraving machine’s in today’s world is wider than our imagination. You can only anneal metals that change color when under the influence of heat and oxygen, i.e. There are many engraving machine on the market that can also be used for dog tag, for example, you can see our 10 best dog tag engraving machine or manual metal tag embossing machine. It is also the preferred method whenever a precision fit is required or there is a need to avoid material bulging. This generates oxide layers on the surface of the workpiece which are associated with metallic annealing colors. Annealing heats the material locally to just below its melting point.
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