What are acetate sheets and do I need them?

Acetate sheets are thin, transparent plastic sheets used in chocolateering to create ultra-glossy smooth surfaces on bars or to make decorative chocolate transfers. For Dubai chocolate, placing a sheet in your mold before adding chocolate can increase the shine of the finished bar beyond what the mold alone provides. They're not essential for home bakers but are standard in professional chocolate production. Rolls are inexpensive and available at baking supply stores.