Jelly powder is also known as gulaman or agar agar, a plant-based powder usually derived from seaweed. It needs to be boiled to set, but it can do so even at room temperature. It will also set far more rapidly than gelatin, in around one hour instead of three. Powdered gelatin is derived from animal collagen from skin and bones. The substance needs to be dissolved in warm or hot liquid to set. Usually, gelatin powder needs to be refrigerated for it to set, which can take several hours, depending on the other ingredients in the dish.