Question: what is the difference between magic sizing and starch?
Answer: A: Starch is used to stiffen fabrics such as shirt collars and cuffs, while sizing is used to add body, “crispness” and “hand” to garments. Starch is vegetable-based (it's formulated from wheat, corn or rice), while sizing is a resinous solution that can be either vegetable- or plastic-based.