AB Dark Rosin for Cello presented in tied cloth. – Made in England – Unique recipe of Waxes and Timber Resins. 12 per master box.
AB Rosin is named after its inventor, Miss Amy Birch. Her achievement, after long experiments, was a compound which worked in harmony with the bow, was unaffected by extremes of temperature or humidity and because of its non-clogging characteristics, helped to produce purity of tone.