4 THE MOLD

Molding of the bust was done in the traditional manner, by building a clay thickness over the isolated object (plastic wrap) and casting the mother mold first (fig. 7). The mother mold and clay were then removed. Following preparation, the warmed CDD in naphtha was brushed over the pigmented marble surfaces, and the solvent was allowed to evaporate for 20 minutes. Unpigmented areas of marble were not coated in order to achieve maximum detail in the mold. Latex rubber was then brushed onto the entire bust and gradually built up in layers. The mother mold was reintroduced to the piece, and urethane rubber was poured to fill the final void between the latex rubber and mother mold. Once set, the mother mold was removed, and the multiple-layer rubber latex–urethane mold was carefully sliced and removed from the bust.