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