Measurement of Br(Ks -> pi+pi-pi0) and limit on the CP violating decay Br(Ks -> 3pi0)

A dentifrice composition that reduces the migration/absorption of flavor into plastic packaging materials, containing a flavor oil in combination with about 5.0%-50.0% and preferably 12.0% by weight of the total flavor oils of polyvinyl pyrrolidone (PVP), dispersed in a dental vehicle. The dentifrice composition may be in the form of a paste, cream or gel. It is essential that the flavor oil and PVP be premixed prior to its addition to the dentifrice composition, preferably as a final step in its formulation.