Roj hnyav yog muaj peev xwm ignition, Tsis tau nws cov composition dense composition ua rau nws nyuaj rau teeb thiab hinders tiav combustion. tiam sis, Nyob rau tej cheeb tsam uas muaj cov pa concentrations, roj hnyav yuav npaj hlawv.
Cov roj Thericating roj, thaum flammable, Tsis ignite li hu nrog ib nplaim li npaj li tej zaum yuav assumed. Nws txuam yuaj rua ib oxidation tshuaj tiv thaiv, nws kuj me ntsis hauv intensity.