Rose oil the aromatics unaltered by heat. Because CO is gas at normal atmospheric pressure, it leaves no trace of itself in the final product. The equipment for CO extraction is expensive, which is reflected in the price of the essential oils obtained from the process. It takes a large amount of rose petals to distill a small amount of essential oil. Depending on extraction method and plant species, the typical yield can be approximately 1:3,000. To mitigate the cost, some dishonest dealers will dilute rose oil with geranium ("Pelargonium graveolens") or palmarosa ("Cymbopogon martinii") essential oils, both of which are rich
Oil-paper umbrella as the umbrella surface is soaked in persimmon pigment. The persimmon pigment is made from fermenting the juice of green persimmons, which provides a suitable stickiness. The soaked flower petals are stuck to the umbrella scaffold one by one. Paintings or pictures are drawn on the peach flower petals prior to painting tung oil on top. The finalized umbrella is left to dry in a dry dark room. It requires at least 70 steps to produce a well-crafted oil-paper umbrella. In Luzhou, Sichuan, the oil-paper umbrella culture started around the end of Ming dynasty and beginning of Qing dynasty. Oil-paper