Robson, B A2015-12-130218-3013http://hdl.handle.net/1885/73696A new composite model for leptons and quarks is presented. The model treats leptons and quarks as composites of three kinds of spin-1/2 particles (rishons), which belong to a fundamental triplet representation of a flavor SU(3) symmetry. A super-strong color-type force binds rishons together to form colorless leptons or quarks. Quarks display a valence property, which corresponds to the quark color of the Standard Model. Leptons have no valence property and are inert with respect to the super-strong color interaction. Both the strong color force and the weak interaction of the Standard Model are residual interactions of the super-strong color force in the new model.Keywords: Additive quantum numbers; Composite models; Fundamental particles; Generation model; Particle generations; Rishons; Standard model; SU(3) symmetry200510.1142/S02183013050037762015-12-11