Coated Metal Engraving
For manufacturers to be able to simplify the process of laser engraving metals, the metal plates are now finely-polished in order to be covered with a fine coat of enamel paint. This special style of manufacturing allows the engraving and removal of the enamel coat, rather than the actual hard metal and it simplifies the process of laser engraving. This happens because the conduction that makes it very difficult to laser engrave steel for example, is perfect for burning off and removing enamel coating.
The enamel can be removed quite quickly at levels between 10 and 30 watts. The process is simple and easy and due to the fact that enamel is vaporized quite cleanly, the final result is an excellent engraving. Enamel is a versatile and non-problematic material that enables the final product to be engraved very easily. A very common example of what a dark enameled background can do is silver lettering on stainless steel. Enamel also allows a lot of fine and detailed finishes, for example, the screen printing of marble effects.
But enamel is not the only substance used to cover metals. Another popular practice that can simplify the laser engraving process is spray coating. Metal coating sprays are especially designed to create a layer that is visible to laser light. Due to their very practical uses, these sprays are not only applied to metals but also to glass and other transparent or reflective materials used for laser engraving.
To make the process of engraving metals even simpler many manufacturers also use laser-markable metals than come pre-coated with sprays and ready for engraving. Laser-markable metals are quite easy to recognize as the spray changes the surface color of the metal to a dark shade of brown or gray.