Hidersine deluxe rosin can be used on violins or violas. This dark amber rosin is slightly softer and grabs the strings a little more. It comes wrapped in a small piece of cloth so you can rosin your bow Without getting sticky fingers. 30gm cake. Hidersine 6V Violin Rosin - designed specifically for use With Steel Strings and made to an original recipe using a unique blend of waxes and resins. Black, Large rosin cake on traditional cloth. Approx 34gram Presented in a traditional box.