European Union neUnited States Department of Agriculture zvinoti: kugadzirwa kwegelatin mushure memazuva matatu ekubvisa acid, mazuva makumi matatu nemashanu ekubvisa ash, gelatin solution mushure mekuvhiyiwa pa138℃ kwemasekonzi mana kuti zvigadzirwa zvive zvakachengeteka (kureva kuti zvisina BSE). Zvisinei, kambani yedu inoshandisa nzira yekugadzira hydrochloric acid leaching ine huwandu hunopfuura 3.5% kwemazuva manomwe, kubvisa ash kwemazuva makumi mana nemashanu, uye glue solution inogadziriswa sterilize pa140℃ kwemasekonzi manomwe.