Tus kheej-ignition ntawm txhuas hmoov yog txuas rau ya raws thiab chav nyob hauv ib puag ncig.
Raws li hmoov, aluminium qhov chaw ua haujlwm tau nce siab, ua rau muaj kev cuam tshuam nrog dej uas tsim cov cua sov thiab hydrogen gas. Yog tias cov roj hydrogen no sib sau ua ke rau ib qho chaw pib, spontaneous combustion tuaj yeem tshwm sim. Tom qab ntawd rau combustion, relighting aluminium hmoov nrog oxygen ua rau muaj zog ntau dua exothermic cov tshuaj tiv thaiv ntawm qhov kub siab.