#$%^&*AU2007203585B220130207.pdf#####ABSTRACT Disclosed is a platelet additive solution (PAS) comprising a viscosity increasing agent. The use of a PAS comprising such a viscosity increasing agent, especially 5 at concentrations effective to achieve a viscosity similar to that of blood plasma, promotes platelet recovery during extraction from pooled buffy coats and provides for easier platelet production by maintaining the red cell/plateletrich-supernatant interface. 10 -45-Co) . 4 m . . . . .. . . .. .w . . . .. .. . .0 C JL . . . . . . . . .. .