Hydroxypropyl Methylcellulose is also known as carbohydrate gum. Unlike other gelifiers, methylcellulose gelifies when heat is applied. When cold it acts as a thickener. There is a wide range of viscosity in methylcellulose, which affects the final result of the gelification. Mix cold, shaking vigorously, and leave to rest in the refrigerator until it reaches 4° C for hydration. Next apply temperature up to optimal range for each product. It is a thermo-reversible gelling agent- when the product cools it loses gel capacity and becomes liquid. You can also produce stable foams with methylcellulose products.