Salchow Light Rosin for Violin, Viola and Cello Salchow Light Rosin for violin, viola, and cello is a premium rosin from American bowmaker William Salchow. It is fast becoming the first choice rosin of many professional players. Professional grade Salchow rosin is very pure with no additives delivering a smooth tone with low dust and residue. It is fast becoming the first choice rosin of many professional players. Professional grade Salchow rosin is very pure with no additives. It delivers a smooth tone with low dust and residue. For Violin, Viola, and Cello