The materials’ constituents of brass nameplate is an alloy of copper and zinc, which similar to bronze. For bronze, the most constituents also is copper, but tin is in replacement with zinc.
To do this nameplate, general technology is etching and then lacquering to relative words or images. Minority of that is just done simple printing or laser engraving.
Brass nameplate has excellent anticorrosion and malleability suitable for decoration or identification wherever in door or outdoor, and it looks luxury. So they are widely used for industrial equipment, marine applications, door sign etc.