The main ingredient of cowhide, sheepskin and pigskin is protein, so they are susceptible to moisture, peeling and worms. To this end, when wearing leather clothes, avoid contact with oily, acidic and alkaline substances.  Leather is best worn frequently and often wiped with fine flannelette. If you encounter rain, damp or mildew, you can wipe off water stains or mildew spots with a soft dry cloth. But do not rub with water and gasoline, because the water glue leather hardens, and gasoline can make the leather oil volatilize and crack.  The pu leather is wrinkled and can be ironed with an ironing fan. The temperature can be controlled between 60 and 70 ℃. Use thin cotton cloth as a lining when ironing, and keep moving the iron at the same time.  Leather loses luster, can be polished with leather polish, do not use shoe polish to wipe. In fact, it is not difficult to polish the leather, as long as you gently wipe it on the leather coat with a cloth dipping polish-twice. Generally, as long as every two or three years on a second light, in order to keep the leather soft and glossy, and can prolong the service life.  If the leather is torn or damaged, it should be repaired in time. If it is a small crack, you can apply some egg white on the crack, and the crack can be bonded.  When the leather is not worn, it is best to use a clothes hanger to connect it; of course, it is also possible to put it flat, but put it on top of other clothes, so as not to crush and wrinkle it and affect its appearance.  The faux leather should be hung before collection, not exposed to the sun, and can be ventilated in a cool and dry place. In order to keep the leather beautiful in color for a long time, you can apply a layer of milk or glycerin on the leather before collection, so that it can be stored for a long time without changing color.

Leather: There is no harmful gas when burning itself, but a large amount of aniline dyes, chromium salts and other chemical reagents are used in the processing of leather. During the combustion process, there will be compounds that release nitrogen (nitrogen monoxide, nitrogen dioxide), sulfur dioxide and other harmful substances. Irritating gas, and the dermis is easy to chapped. PU Leather: burning will produce some harmful and irritating plastic gases such as hydrogen cyanide, carbon monoxide, ammonia, nitrogen compounds (nitric oxide, nitrogen dioxide, etc.) PVC Leather: Dioxin and hydrogen chloride are produced in the combustion process and production process. Dioxins and hydrogen chloride are highly toxic substances that can cause cancer and other conditions, and produce a pungent plastic odor. (The main odor comes from solvents, finishing agents, fatliquors, plasticizers and mildew inhibitors, etc.) Silicone Leather: no harmful gas is released, and the burning process is refreshing and odorless.  

The distinction between PU and PVC is still relatively easy. Judging from the corners, PU base cloth is much thicker than PVC, and the hand feel is different; PU has a softer hand feel, while PVC is harder; it can also be burned with fire, and PU has a much lighter smell than PVC. It can be distinguished by the method of soaking in gasoline: use a small piece of fabric, put it in gasoline for half an hour, and then take it out. If it is PVC artificial leather, it will be hard and brittle; if it is PU synthetic leather, it will not be hard and brittle. There are also some differences in the range of applications of the two materials. In footwear, PVC leather is mainly used for linings or non-load-bearing parts, or in the manufacture of children's shoes. PU leather can be used for footwear fabrics or load-bearing parts. For luggage, PVC leather is used more. This is because the items in the bag, unlike the feet worn by the shoes, do not radiate heat and do not carry personal weight.