Engraving - Drag
Drag engraving also known as scratch engraving is the most common type of engraving for use on metals such as brass, aluminum, pewter, silver and gold.
Computerized diamond-drag engraving is done on site to remove the top coloured coating to expose bare metal underneath (gold if brass, silver if aluminum). If the material has a clear coating instead of coloured, the engraved area can be oxidized to blacken it and provide a contrast to the background.
