  We introduce a kinetical description of the hadronization of semi-deconfined
quark matter produced in heavy ion collisions. A minimal microscopic model is
considered in which the produced quarks and anti-quarks are redistributed into
hadrons according to the additive quark model. Assuming thermalized quark
matter and hadron matter we determine the appropriate parameters to describe
the properties of both matter before and after hadronization. We find an
adiabatic hadronization.
