The finishing procedure that reinforces the established lines of the design is known as:

The finishing procedure that reinforces the established lines of the design is known as dry moulding. This technique involves using a styling product or tool to create firmness in the hair's shape and structure after the preliminary styling has occurred. Dry moulding allows hairstylists to enhance the details of the hairstyle by defining the edges and overall silhouette without adding moisture, which could alter the intended shape or texture that had been previously set.

In contrast, wet finishing typically involves the use of moisture to set styles during the finishing phase, which may not emphasize the established lines as strongly as dry moulding. Style setting often refers to the overall process of arranging hair into a desired form, which may include various stages but does not specifically focus on reinforcing lines. Final styling generally covers all last-minute adjustments and checks but lacks the specific focus on reinforcing established lines that dry moulding provides.