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What is an etched sign?

An etched sign is created by removing a layer of material from the surface of the metal using a chemical process.

The chemical etching method of engraving uses high-pressure and high-temperature chemicals to precisely remove material from a metal surface and create an engraved look. 

First, a protective layer known as a mask or resist is applied to the metal surface. This mask shields some parts of the metal to prevent the chemical from etching them. Next, specific parts of the mask are selectively removed, exposing only the areas of metal that need to be engraved.

The exposed metal is then etched away by the chemical, while the covered areas remain intact. The result is a clean, precise engraving where the material is removed in the desired design. Using this method, the etching process creates depth and texture on the metal surface.