Is the Deep-Drawing Process Affected by the Color Coating on Aluminium Circles?

A common concern among manufacturers is whether a pre-applied color coating can survive the "deep-drawing" process. Deep drawing involves pushing a metal circle into a die to create a cylindrical or box-shaped form, such as a deep pot or a canister. This process stretches the metal significantly. If the coating is brittle, it will crack; if the adhesion is poor, it will peel.

Fortunately, modern color-coated aluminium circles are engineered specifically for this type of fabrication. High-quality coatings are formulated with "macromolecular" resins that possess high elasticity. During the drawing process, the coating moves in tandem with the aluminium molecules. This is achieved through a precise baking process where the paint is "cured" at specific temperatures to ensure maximum cross-linking of the polymer chains. Additionally, a thin protective film is often applied over the color coating, which acts as a lubricant during the die-stamping process and protects the finish from tool marks. By using pre-coated circles, companies can move directly from stamping to assembly, skipping the expensive and environmentally hazardous "wet painting" or "powder coating" stages in-house. This streamlined workflow is a major reason why pre-coated aluminium is dominating the 2026 manufacturing landscape.