What factor primarily determines the success of producing an enameled watch dial?

The success of producing an enameled watch dial is primarily determined by the nature of the support. This involves the material and surface preparation of the substrate onto which the enamel is applied. A high-quality support ensures good adhesion and durability of the enamel, which are crucial for achieving a flawless finish and long-lasting appearance.

Different materials can react differently under heat and during the enamel application process. For example, certain metals provide a more stable base that can withstand the heating processes required to fuse the enamel properly without warping or damaging the dial. Moreover, the surface finish of the support plays a key role in how well the enamel adheres and how the final aesthetic of the dial appears.

While factors like color, thickness, and heating effects are important, they are secondary to the fundamental requirement of having a suitable support that can enhance the overall quality and success of the enameling process.