1. Cov khoom siv Crystallized, qis hygroscopicity, yooj yim rau yaj kev tawg, lub sijhawm ntev kev sib cuag nrog cov hlau kub yog qhov yooj yim rau kev decompose.
2. Zoo fluidity, tab sis lub shrinkage ntau thiab shrinkage tus nqi yog loj, thiab shrinkage, hniav thiab deformation yog yooj yim tshwm sim.
3. Qhov txias txias yog ceev, qhov tso cov txheej txheem thiab lub zog txias yuav tsum maj mam ploj mus, thiab cov cua kub yuav tsum raug tswj. Cov khoom kub tau yooj yim rau kev qhia ntawm qhov kub tsawg thiab kev kub siab. Thaum pwm kub qis dua li 50 degrees, cov feem yas tsis du, thiab nws yog qhov yooj yim los tsim cov hlau tsis zoo thiab cov cim ntws. Warping deformation yog ib qho yooj yim tshwm sim siab tshaj 90 qib
4. Lub hnab yas phab ntsa tuab yuav tsum zoo ib yam kom tsis txhob muaj cov kua nplaum thiab lub ntsej muag ntse kom tsis txhob muaj kev kub ntxhov.
