Starch adds crispness and structure, providing body to cotton and linen items. It also creates a higher resistance to wrinkling and soiling. Using starch will also ease ironing. Durable synthetics can be “starched,” but cannot be treated with grocery spray starch. It is important to remember, when you ask for starch, you need to specify light, medium or heavy. The more starch used, the stiffer the fabric will be after ironing—starch is typically applied while the clothing is being pressed.