High quality rosin allows for perfect bowing without scratchy sounds, especially if only a thin layer of rosin is applied. The general rule is that violinists and violists use a harder, dryer rosin, cellists use a medium strong rosin and bassists a softer rosin.

Another important aspect for choosing the right rosin is the core material of the string that are being used, steel strings are easier played if you use a hard, dry rosin and for synthetic, gut and gut wound strings use a softer rosin