Lim caij yog lub sij hawm tshaj lij hauv kev lag luam lim. Cov khoom siv ua kom huv si yog qhov xav tau txhawm rau ntxuav cov khoom qub kev lag luam zoo thiab siv cov khoom siv tshiab. Tam sim no cov lim lim tau siv cov roj lim, kev lim cua, kev lim dej thiab lwm yam kev lag luam pom. Txhawm rau tshem tawm qhov me me ntawm cov khoom me me hauv cov kua lossis huab cua, nws tuaj yeem tiv thaiv kev ua haujlwm zoo li qub ntawm cov khoom siv lossis ntxuav huv. Thaum cov kua dej nkag mus rau lub lim lim nrog qee qhov qhia tshwj xeeb lim, nws cov impurities raug thaiv, thiab cov dej huv tawm tawm hauv cov lim tawm.
Tam sim no, daim teb thov ntawm lim ntsiab feem ntau koom nrog kev sib cais, kev paub meej, kev ua kom huv, thiab kev ua kom pom tseeb hauv thaj teb kev kho dej, khoom noj thiab tshuaj, electrophoretic txheej hauv kev tsim kev lag luam kev lag luam, luam ntawv thiab dyeing tshuaj, kev tiv thaiv ib puag ncig, thiab lwm yam.