Cov txheej txheem siv roj av

1. Noj 1 kg ntawm paraffin thiab sov nws nyob rau hauv ib lub lauj kaub tais diav kom yaj. Tom qab nws yaj tag, ntxiv 6 kg ntawm charcoal hmoov thiab 1.2 kg ntawm sawdust hmoov, ntxiv thaum stirring, thiab stirring ntawm 60 degree rau 5-8 feeb. Sib tov cov hmoov sawdust zoo, tom qab ntawd txias nws rau kev siv tom qab.
2. Thaum cov roj saum toj no txias qis dua 250 degree, ncuav 800 grams cawv rau hauv lub sprayer, thiab tsuag cov cawv rau hauv cov ntaub ntawv raw thaum nplawm. Tom qab stirring sai sai, ncuav nws mus rau hauv ib lub lauj kaub me me kom cov sib tov tsuas yog tag nrho, npog nrog ib daim ntawv yas kom tsis txhob haus cawv los ntawm evaporating.
3. Muab cov khoom sib tov rau hauv pwm, muab tso rau ntawm lub tshuab xuas nrig ntaus los yog lub rooj zaum clamp thiab nias rau hauv cov duab.
4. Muab lub lauj kaub rau ntawm qhov hluav taws kub, muab tso rau hauv 10 kg (tsuas yog hais txog 1 kg yog noj), tom qab melting, muab cov ntaub ntawv raw block rau hauv molten wax thiab qhwv ib tug nyias txheej ntawm wax, coj nws tawm thiab txias nws. los ua cov khoom siv roj Cov khoom tiav tuaj yeem muag tom qab ntim khoom.