Next the keys are polished. Keys for competitively priced models may be placed in a tumbling device, where friction and agitation of pellets in a revolving
drum polish the pieces. More costly keys may be buffed for my part by being held in competition t the rotating wheel of a sprucing
device. Some keys may be silver plated, after which polished. Clarinet manufacturing itself is a pretty conservative industry, depending on highly skilled craftspeople who do much work by hand. Most of the emotions in clarinet design at the moment are 100 years old.