What hair design technique involves circular movements over the head for wave formation?

The technique that involves circular movements over the head for wave formation is known as molding. This method is essential in hair design as it helps establish the foundational shape and texture of the hairstyle. By using a circular motion, the stylist can create a wave pattern that allows for flexibility in styling and supports the overall structure of the hairdo. Molding is especially useful when working with wet hair, as it allows for better manipulation of the hair strands, helping to achieve the desired waves and curls.

In contrast, shaping typically refers to the process of creating basic forms and can involve various methods but does not specifically denote the circular motion associated with wave creation. A silk press is a technique used to straighten the hair and provide a polished, sleek finish, which does not relate to wave formation. Ribboning involves manipulating the hair in a specific manner, often with additional products, to define curls or waves, but it does not focus on the circular movements that are characteristic of molding.