Kolstein Rosins are specifically formulated for each instrument, offering strong, even adherence, long lasting power, and extremely low powdering. It has an indefinite shelf life made possible by a continual wetting agent in the formula which prevents crystallization, permits easier application, and promotes reduced powdering while playing, as well as preventing the rosin from drying out with age.A History of Kolstein RosinsUpon analyzing the rosin situation of the modern day violinist, violist, cellist and bassist, it became apparent that the need for a consistent rosin specifically formulated for each instrument was greatly needed. Prior to the development of Kolstein"s Formulation Supreme Rosins, rosin was generically made for all instruments with players being forced to use rosins which were not formulated with the individual instrument"s requirements. For that matter, the violin, viola, and cello players were using identical cakes of rosin.Kolstein"s Formulation Supreme Rosin has corrected this problem so that each string player has the option of having not only their own specifically formulated rosin.In producing our Kolstein Rosin line,