2. Water-soluble starchA milky-white or pale yellow powder, odorless and tasteless, it does not dissolve in cold water but becomes a completely transparent solution when boiled. It does not freeze upon cooling. Water-soluble cassava starch can generally be made from rice, corn, millet, and potato starch, but the quality is better when made from sweet potato starch. The granules of sweet potato starch are coarser, and the outer cellophane wrapping tends to crack during the hydrolysis reaction, making it very prone to drying. The production process involves taking a certain amount of sweet potato starch and...80Fine mesh sieve, placed in a large vat, add8%-9%Muriatic acid, mix the aqueous solution into a thin, sticky consistency.40-45Celsius Pre-Soaked24Hour, or place at room temperature6-7Any day is fine.