Anodized aluminum is commonly engraved or etched with CO laser machines. The cups were frequently engraved and decorated with precious metals. They have unique symbol markings engraved on them for identification. The Ashokan inscription is engraved in early Brahmi characters. Softer materials such as silver may be hand engraved as a refinement. Sometimes larger vessels were engraved as well as painted. At first, plates were engraved freely by hand. Furthermore, Every mints his own currency&colon; gold coins engraved in his royal likeness. The phrase is still engraved on the Super Bowl rings. He also leaves his canteen, in which he engraved a spiral symbol, with Glass. Patterns such as the meander symbolizing eternity was also commonly engraved into jewellery. The monument is engraved on both sides. The planispheres were engraved in stone several decades later. Generally, four pages of music were engraved on a single plate. The image was engraved and colored by Robert Havell's London workshops.