Wakilin karewa na ɗan lokaci shine mai karuwa don tsufa. Saboda akwai nau'ikan da yawa, an ba da shawarar zaɓi nau'in da ya dace gwargwadon buƙatun da maki sunadarai. A yayin aiki, karancin wakilin karewa mafi yawa shine mafi yawan mafita, yayin da wakilin karewar kwayar halitta galibi ne emulsion. Tare tare da kammalawar wakili, UV - ana buƙatar wakili na sauri da sauran Auxilies a lokacin samarwa.
