The structure development in dispersions of magnetic barium ferrite particles in cyclohexanone with polyvinylchloride wetting resin was tested by oscillatory rheological measurements and orthogonal superposition of steady and oscillatory shear. The optimum dispersion is achieved at the resin concentrationc=c0,which corresponds to a minimum in the viscoelastic modulii. Atcc0the system becomes less elastic, more flexible, less thixotropic andH(τ)is dominated by short τ, which indicates that the structure formation in this case is dominated by small aggregates rather than a network. By superimposing steady and oscillatory shear we show that the steady shear dramatically break the structure and shiftsH(τ)to very short τ.