Source: cybersax.comBear at Cybersax.com said:There are two techniques for achieving [bell wash]. A yellow gold effect is achieved simply by briefly plating a highly polished silver inner bell in 24 karat gold. The plating bath isn't maintained long enough to make the surface layer so dense in gold to be 'gold plated' - merely 'washed' over with a lovely golden tint. The second method results in a 'rose gold' effect, used primarily by Buescher on its silver plated saxes made after about 1925. 'Rose gold' is gorgeous, but really not gold at all. The 'rose gold' effect is achieved by laying on a copper wash (thin layer of copper plating) instead of a 24K gold wash.
