In coating terminology, what term describes the material under a layer of paint?

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Multiple Choice

In coating terminology, what term describes the material under a layer of paint?

Explanation:
The material under a layer of paint is called the substrate. It’s the surface or base material that the coating system sits on—like metal, wood, concrete, or plastic—and provides the structural support for the paint. A primer is a preparatory layer applied on the substrate to improve adhesion and seal the surface before the topcoat goes on. The topcoat is the outer layer that gives the color and final protection. An adhesive is used to bond materials together and isn’t the base material beneath paint. So, the substrate is the correct term for what lies directly under the paint.

The material under a layer of paint is called the substrate. It’s the surface or base material that the coating system sits on—like metal, wood, concrete, or plastic—and provides the structural support for the paint. A primer is a preparatory layer applied on the substrate to improve adhesion and seal the surface before the topcoat goes on. The topcoat is the outer layer that gives the color and final protection. An adhesive is used to bond materials together and isn’t the base material beneath paint. So, the substrate is the correct term for what lies directly under the paint.

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