  In a simplified model we study how close can the result of a fast,
non-equilibrium hadronization of quark matter in an expanding fireball come to
hadronic composition in equilibrium. We present a chemical approach to the
simple A+B --> C quark fusion, showing ideal equilibrium constrained by
conservation laws, the fugacity parametrization, as well as linear and
non-linear quark coalescence models as different approximations to this
chemistry. It is shown that color confinement requires a quark density
dependent hadronization cross section.
