What's different between collagen casing and natural casing?

Raw material:
Natural casings: Derived from the intestines of animals (pig intestines and sheep intestines), they are natural by-products.
Collagen casings: Made from collagen extracted from cattle's skins,and processed artificially.

Appearance and Specifications
Natural casings: Uneven in thickness, color and thickness, with natural textures on the surface, they are closer to the traditional appearance.
Collagen casings: uniform specifications (consistent diameter, length and thickness), smooth surface, and even color.

Taste and flavor
Natural casings: When bitten, they have a crisp and tender texture, good chewability, and combine naturally with the meat filling, providing a better flavor.
Collagen casings: They have a relatively soft or slightly chewy texture. Some products may lack the "bursting sensation" of natural casings.

Processing performance
Natural casings: low strength. They are sensitive to temperature and humidity, and the finished products tend to shrink easily.
Collagen casings: High mechanical strength,collagen casings are suitable for automated high-speed filling, resistant to freezing and high temperatures (can be steamed, boiled or fried).

Storage and Shelf Life
Natural casings: Usually need to be salted or refrigerated for preservation, with a relatively short shelf life. They should be washed and soaked before use.
Collagen casings: Can be stored at room temperature and kept dry for a long shelf life. The shelf life is 3 years.It's easy to be handled,no need to be soaked in the water before using.

Cost and Output
Natural casings: Due to the constraints of the livestock industry, they are relatively expensive, with unstable production and difficult-to-uniform specifications.
Collagen casings: industrially produced, with low cost, stable supply, and suitable for large-scale production.

Application scenarios

Natural casings: Mostly used for high-end, traditional or handmade sausages (such as European sausages, air-dried sausages) with natural flavor.
Collagen casings: Commonly used in fast food, low-temperature meat products, hot dogs, snack sausages and other mass-produced items.

Summary: Natural casings can keep traditional taste and natural attributes, but the prices are higher and inconvenient to handle. Collagen casings, on the other hand, are convenient for industrial production and have uniform specifications, but their taste and flavor are slightly inferior to those of natural .