Secrets of Sausage Casings: Natural vs. Artificial
Classification： Industry News
Time：2025-06-23
In the production of Cantonese lap cheong (cured sausage), the casing, though seemingly insignificant, plays a crucial role. Lap cheong casings can be divided into natural and artificial casings based on their raw materials. Natural casings are usually made from pig small intestines, and the production process is complex. First, the fat and meat must be scraped off the pig small intestine and thinned. This process requires extra care; otherwise, the casing is easily scratched or leaves fat residue. In the past, this could only be done manually. Although there is now modern equipment, manual assistance is still required. After scraping, the casing must be repeatedly rinsed, a step that alone takes most of a day. After rinsing, "blowing the casing" involves tying off one end of the casing and inflating it with air using manual or air pump methods. After fully inflating, it is hung to dry. The casing must be intact without holes, and it cannot be too thin during scraping. "Casing-setting" involves placing the casing over an inflated tube for shaping and drying. Because it can be stretched and expanded, it becomes a translucent milky white after drying, while the "blown casing" is a translucent pale yellow. Lap cheong made with "blown casings" has a crispier texture and a stronger burst of juice. Artificial casings, also known as collagen casings, are made from collagen protein fibers from the dermis of cattle and pig hides. Their production process can be mechanized, resulting in high production efficiency and low labor costs. However, lap cheong made with natural casings is more "form-fitting," has a more attractive appearance, a crispier texture, and a relatively higher price. Consumers can determine which type of casing is used in the lap cheong by checking the ingredient list on the packaging, observing the appearance, and smelling the aroma.
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The cultural story and historical inheritance behind Lap cheong (Chinese sausage)
The history of sausages can be traced back thousands of years. In ancient times, in order to preserve meat, people invented methods of salting and air-drying, and sausages were thus born. During the Roman era, sausages were already a common food, and soldiers would carry them on campaigns to replenish their energy. In China, the history of making and eating sausages is also very long. According to records, the Northern and Southern Dynasties' "Qi Min Yao Shu" contains records about sausage-making methods. Different regions have their own unique sausage cultures. For example, Guangdong lap cheong making techniques have been listed as an intangible cultural heritage, carrying the life wisdom and emotional memories of the Guangzhou people; Sichuan sausages reflect the people of Sichuan and Chongqing's love for spicy flavors and their unique food culture. These sausages are not only delicacies but also carriers of cultural heritage.
Nutritional Value and Healthy Eating Suggestions for Lap Cheung (Chinese Sausage)
Nutrition experts point out that sausages are rich in protein, fat, B vitamins, and trace elements such as iron and zinc. Moderate consumption can supplement the body's energy, especially protein, which can help with muscle repair and growth. However, due to the addition of a large amount of salt and spices during the production process, sausages are high-salt and high-fat foods. Excessive consumption will increase the risk of hypertension and cardiovascular diseases, and may also affect health due to excessive intake of nitrites (produced during processing). It is recommended that adults consume no more than 50 grams per day, and it should be paired with vegetables rich in dietary fiber (such as broccoli, celery), fruits (such as apples, oranges), and whole grains (such as oats, brown rice) to promote intestinal motility and reduce the absorption of fat and salt. At the same time, when cooking, try to choose steaming or boiling methods, avoid frying, and reduce fat intake.
Recently, Beth (Shen Xianggan), founder of the high-quality food importer Hafei, gave a detailed interpretation of Guangdong Lap Cheung (Cantonese sausage). Guangdong Lap Cheung can be simply classified by the filling and shape enclosed in the casing, with different types having different characteristics in terms of fat-to-lean ratio, texture, and flavor. Fresh meat Lap Cheung is slender and long, juicy, with a fat-to-lean ratio of 7:3; Dongguan Lap Cheung is short, thick, and large, with a crisp and elastic texture, and a fat-to-lean ratio of 6:4; goose liver Lap Cheung is small and finger-like, soft and fragrant with rose liqueur, with a fat-to-lean ratio of 8:2; duck liver Lap Cheung is slender and dark brown, soft and sweet, with a fat-to-lean ratio of 7:3; and gold and silver Lap Cheung is long and horn-shaped, black in color, rich and fragrant, with a fat-to-lean ratio of 5:5. In making high-quality Lap Cheung, every step from selection, cutting, seasoning, pickling, filling, tying, to drying is crucial. Traditionally, pig or sheep intestines, after complex processing, can make the Lap Cheung more resilient and crisp, while some now use collagen casings instead, which will affect the taste of the Lap Cheung. The drying process reduces the moisture content of the Lap Cheung. In the past, sun-drying or charcoal oven drying was often used. When purchasing Lap Cheung, choose products that are dry on the surface, have even concave-convex textures, normal color, and no peculiar smell or rancid smell. In terms of preservation, due to the humid weather in Hong Kong, Lap Cheung can be stored for more than half a year at -18 degrees Celsius in an ice compartment; if stored in a refrigerator at 4 to 10 degrees Celsius, it can be stored for up to two months, and prolonged storage will easily cause rancidity and spoilage.