ʻO ka Hui ʻEulopa a me ka 'Oihana Mahiʻai o ʻAmelika Hui Pū ʻIa i ʻōlelo ʻia: hana gelatin ma hope o 3 mau lā o ka leaching acid, 35 mau lā o ka lehu lehu, solution gelatin ma hope o ka sterilization ma 138 ℃ no 4 kekona no nā huahana palekana (ʻo ia hoʻi me ka BSE manuahi).Eia nō naʻe, hoʻohana maoli kā mākou hui i ke kaʻina hana o ka waika hydrochloric leaching me ka ʻoi aku o ka 3.5% no ka liʻiliʻi o 7 mau lā, ka lehu lehu no ka liʻiliʻi loa he 45 mau lā, a me ka hoʻonā glue sterilized ma 140 ℃ no 7 kekona.