When it comes to durability and versatility in crafting and construction, ounce hardboard paper emerges as a reliable choice. Let's explore the characteristics and applications of this resilient material: Definition: Ounce hardboard paper, also known simply as hardboard paper, is a type of composite material made from wood fibers that have been processed and compressed under high pressure and temperature. This results in a dense, sturdy board with a smooth surface on one side and a textured or rough surface on the other.