Evenly sprinkling powdered gelatin over an exact amount of very cold water to bloom. Avoid sprinkling on the edge of the container as the gelatin will not bloom properly and dry out. Bloomed gelatin must be melted before using. Melt by itself or by adding it to a portion of a formula's liquid that has been warmed.
Placing gelatin sheets one at a time in an unmeasured amount of very cold water to bloom evenly without sticking together. Use cold water to keep the gelatin from melting while blooming. Because gelatin sheets are less processed than powdered gelatin, they yield a finer, clearer final product.