1, natural casing is made of large and small intestines of domestic animals by scraping, which is tough and translucent. Natural casing has good elasticity and strong water retention, and can be safely eaten. The elasticity, flexibility and breathability of artificial casing are poor, the filling amount is fixed, and there is plastic odor at high temperature.

2. Artificial casing Except for a collagen casing, other artificial casings are generally inedible. Even if it is an edible collagen casing, additives are easy to cause safety hazards. If glycerin and preservative are added, some new techniques such as improving taste and resisting high temperature are adopted. Whether these processes are safe or not should also be highly valued by the management department.

3. When choosing casing, you should first pour water to observe, and obvious blood vessels and meridians will be found on the surface of natural casing; The artificial casing is very smooth and has no trace.