Cov khoom siv tau ua tau los ntawm cov tawv nqaij ntawm npua, nyuj, nyuj, nees, thiab nees. Nws yog qhov pib, sterilized, thiab siav rau cov kua txiv. Cov kab mob gelatin, cov yeeb yaj kiab, thiab hmoov (feem ntau yog hmoov) cov pos hniav). Nws yog ib qho tseem ceeb thiab kev ntxiv hauv kev lag luam khoom noj. Nws yog feem ntau siv los ua tus sawv cev ntawm tus kheej, emulsifier, thickener thiab meej thiab meej, npias, kua txiv, kua txiv,
