The European Union and the United States Department of Agriculture stipulate: gelatin production after 3 days of acid leaching, 35 days of ash leaching, gelatin solution after sterilization at 138℃ for 4 seconds for safe products (i.e. free of BSE). However, our company actually uses the production process of hydrochloric acid leaching with a concentration of more than 3.5% for at least 7 days, ash leaching for at least 45 days, and glue solution sterilized at 140℃ for 7 seconds.