Takeappropriateamountofcorn(orrice)burstintoflowerpot,andclosedagoodroof,thenburstonthericepotonthestovesothattheycontinuetoturntheheatevenly,canbedeliciousouttothepopcorn.
Thisisintheheatingprocess,thepottemperaturerising,andthepotofgaspressureisalsoincreasing.Whenthetemperatureiselevatedtoacertainextent,thericegrainswillbegraduallysoftened,cookedricewithmostofthewaterintosteam.Duetohightemperature,watervaporpressureisgreat,sothathassoftenedtheexpansionofthericegrains.Butthistimethepressureinsideandoutsidethegrainofriceisbalanced,sograinofriceinthepotwillnotburstopen.
Whenthepotatmosphericpressureroseto4-5months,suddenlyburstopenthetopoftheflowerpot,potandtherapidexpansionofthegas,quicklyreducethepressure,makingthepressuredifferenceinsideandoutsidethericegrainsbecomelarger,resultinginagrainofricewithhigh-pressuresteamalsoTherapidexpansionofthetransientburstopengrainofrice,whichhasbecomethepopcorn.