Uphawu lwensimbi engagqwali into yokuhlobisa evame ukusetshenziswa kumabhodi nezimpawu zasendlini nangaphandle.Yenziwe ngensimbi engagqwali futhi inezici zokumelana ne-oxidation, ukumelana nokugqwala, ukumelana nezinga lokushisa eliphezulu, nokumelana nesimo sezulu esihle.
Izimpawu zensimbi engagqwali zingenziwa zibe izimo nosayizi abahlukene ngokusika, ukugxiviza, ukufutha, nezinye izinqubo.Izitayela zefonti ezijwayelekile ziyizinhlamvu eziyisicaba, izinhlamvu ezingenalutho, izinhlamvu zezinhlangothi ezintathu, njalo njalo.Noma yiziphi izinhlamvu, izinombolo, nezimpawu kungenziwa ngendlela oyifisayo ngokwezidingo zakho.
Uphawu lwencwadi yokushisela yensimbi engagqwali wuhlobo lwempahla yensimbi engagqwali ngenqubo yokushisela eyenziwe ngomaka.Yenziwe ngepuleti lensimbi engagqwali ngokusika, ukugoba, ukushisela, nezinye izinqubo.