How is gelatin produced?​

I.Raw Material Preparation​

Gelatin production starts with animal by-products (skins, bones, tendons), which are cleaned, degreased, and crushed. Pig skins (30–50% collagen) and cow bones are most common. Raw materials undergo inspection to ensure they’re free from disease or contaminants, a critical step for food/pharmaceutical-grade gelatin.​

II.Hydrolysis Methods​

Acid hydrolysis (type A gelatin) treats materials with hydrochloric acid for 24–48 hours. Alkaline hydrolysis (type B gelatin) uses lime wate for 3–8 weeks. Enzymatic hydrolysis, a newer method, uses proteases to break collagen bonds, reducing processing time and environmental impact. Each method produces gelatin with distinct bloom strengths and amino acid profiles.​

III.Purification and Drying​

After hydrolysis, the gelatin solution is filtered to remove impurities, deionized to adjust pH, and concentrated under vacuum. Spray drying (hot air) or freeze drying (low temperature) converts the liquid into powder or sheets. The final product is tested for bloom strength, viscosity, and microbiological safety before packaging for specific industries.​