Traditional production methods have been in use since roughly the 15th century. The process involves using molds to cast the calaveras. Production can be a lengthy process: a craftsman will usually spend roughly four to six months producing the skulls for a season. Traditionally made sugar skulls are considered folk art and are not meant to be consumed.
The production process is more focused on the aesthetic appeal of the skull than on the taste or food safety of the product. Furthermore, many calaveras feature inedible decorations, such as beads, feathers, and foil. Some skulls were formerly decorated with sombreros, although these designs have mostly disappeared since the 1970s.
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