The helps Double Bass players find the exact combinationof stickiness, grip, traction & lyrical quality to suit their playing needs.
The rosin is available in various hardness levels, indicated by percentages (e.g., 30%, 40%, 45%, 50%, and 55%). The higher the percentage, the softer and stickier the rosin.
40% (The "All-rounder"): This percentage is considered the most versatile option. It sits right in the middle: firm enough for a clear, lyrical tone in solo or upper registers, yet soft enough to provide sufficient grip without the rosin feeling sticky. Many bassists choose the Leatherwood Amber 40% because it performs consistently across changing seasons.
Strijkinstrumentenshop sells only the 40% hardness level.