Stiffening agents are substances added to materials to increase their rigidity and structural integrity. Commonly used in textiles, these agents help fabrics maintain their shape and resist wrinkling. Examples include polyvinyl alcohol and starch, which can be applied during manufacturing or as a finishing treatment. In addition to textiles, stiffening agents are also utilized in various industries, such as construction and food processing. In construction, they enhance the strength of concrete, while in food processing, they can improve the texture of products like cheese and sauces. These agents play a crucial role in ensuring the desired performance of materials.