The molding properties of cast bodies such as stiffness, crack forming resistance, mold separation ability and workability in finishing operation were discussed. These properties have been expressed by the equations as functions of the fundamental parameters that had previously reported by the present author. The results are summarized as follows:
1) The stiffness may suitably be given by the strength of surface layers of casts (st_Ds) and average strength of casts (st_D), which can be calculated by the equations st_Ds=Bf(1)(AF₃^2/3)Sa, and st_D=st_Ds×f(d_D/ds)/f(1), respectively. The difference between (st_Ds) and (st_D) relate to the moisture distribution in casing layers during casting (F₃⋅Sa⋅ds), the mold separation coefficient (G) and the yield value of slips (θ).
2) Crack forming resistance of casts may properly be given by the crack resistance coefficient (H⁰) and the time for crack formation (t_K), and they can be calculated from the equations; H₀=Jf(st_Ds)/AG, t_K=FcG(H₀/M-1)/ωF_D.
3) For a good mold separation ability, it is required that the cast strength is satisfactorily greater than the strength of cast-mold-interface. As the strength of the interface is closely related to mold-deflocculant reaction and other interface conditions, it is difficult to estimate the mold separation ability from the fundamental parameters and the coefficient that have been introduced by the author.
4) Workability in finishing operation can suitably be expressed by the maximum deformation of surface layers of casts (D_Ds), which can be given by the equation, D_Ds=Jf(st_Ds).

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