How did lead models help Renaissance goldsmiths produce decorative metalwork?

During the Renaissance and Mannerist periods, the demand for elaborate relief ornamentation exceeded the modeling capabilities of many individual goldsmiths. To address this, pattern makers in cities such as Augsburg and Nürnberg, Germany, produced and sold lead models of ornamental details and figures.1

These lead models served as essential templates for goldsmiths working elsewhere, who used them to create their own molds for metalwork. Lead was particularly well-suited for this purpose because it casts effectively, preserving fine detail from the mold, and possesses a low melting point that makes it easy to work with. By utilizing these pre-made lead patterns, goldsmiths could incorporate complex, high-quality designs into their own decorative metalwork with greater precision and efficiency.123