Petroleum jelly ointment on his injuries and showing his past injuries healed, he claimed, by his miracle product. He opened his first factory in 1870 in Brooklyn using the name Vaseline. Petroleum jelly is a mixture of hydrocarbons, having a melting point usually close to human body temperature, approximately . It is flammable only when heated to liquid; then the fumes will light, not the liquid itself, so a wick material like leaves, bark, or small twigs is needed to ignite petroleum jelly. It is colorless or has a pale yellow color (when not highly distilled), translucent, and devoid of taste and
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