Petroleum jelly plastics and minimize ventilation issues, isopropyl (rubbing) alcohol can be used to remove petroleum jelly from most surfaces. Isopropyl alcohol is inert to most household surfaces, including almost every plastic, and removes petroleum jelly efficiently. While alcohol causes fewer ventilation problems than petroleum solvents, ventilation is still recommended, especially if large surface areas are involved. Petroleum jelly is also soluble in lower-molecular-weight oils. Using an oil to dissolve the petroleum jelly first can render it more soluble to solvents and soaps that would not dissolve pure petroleum jelly. Vegetable oils such as canola and olive oil are commonly used to
Grass jelly then cooling the liquid to a jelly-like consistency. This jelly can be cut into cubes or other forms, and then mixed with syrup to produce a drink or dessert thought to have cooling ("yin") properties, which makes it typically consumed during hot weather. The jelly itself is fragrant, with a smoky undertone, and is a translucent dark brown, sometimes perceived to be black. Food coloring may sometimes be added to make it darker. Some other variants of grass jelly, known as green grass jelly, don't require cooking or heating process to make, only requiring a mixture of leaf extracts and