The Unique Cross Point technique, offering uniquely the optimum loading of carbon blacks a reinforcing filler required in rubber compounds in tir industry, has been proposed. The strength of the technique lies in opti-mizing the feasible loading by both Mooney viscometer and DSR(Dynamic Stress Relaxometer) simultaneously. In this study, the Mooney viscosity(ML1+4,125℃) ηx as a function of its loading X and characteristic value γ was expressed as ηx=ηoㆍγㆍ(1+a₁X+a₂X²). And also Sr’, the relative integral in two seconds of torque from DSR, was a function of X as follow Sr’=b_o+b₁X. After thermal cure the natural rubber compounds loaded with the quantity designated by the cross section of the above two equations showed so feasible properties confirmed by tensile tester, Pico abrasion tester and Flexometer that the experimental coefficients of the equations applicable to fields are listed in Table 2.