What is the purpose of sizing in paper crafting?

The purpose of sizing in paper crafting is primarily to stiffen the paper or to seal surfaces such as a wall or canvas. Sizing involves applying a gluelike substance that penetrates the fibers of the paper, resulting in increased durability, resistance to moisture, and improved performance when other materials, like paints or inks, are applied to the surface. This treatment allows for better control of how the paper absorbs liquids, which can be crucial in various techniques such as watercolor painting or printing.

Understanding this aspect of sizing highlights its importance not just in enhancing the structural integrity of paper, but also in providing an optimal surface for artistic applications, ensuring that the final product meets the creator's vision effectively. The other options focus on different processes related to paper crafting that do not involve the specific function of sizing, making them less relevant in this context.