Although ultrasonic retting is mainly used in an aqueous solution, it is possible - depending on the raw material and the targeted outcome - to combine the ultrasonic process with an alkali treatment.
Nakuba i-retting i-ultrasonic isetshenziswa kakhulu kwisisombululo se-aqueous, kungenzeka - kuye ngokuthi izinto eziluhlaza kanye nomphumela ohlosiwe - ukuhlanganisa inqubo ye-ultrasonic nge ukwelashwa kwama-alkali.