Ibyuma bishushanyijeho sandwichi by'icyuma, ni ubwoko bw'ibikoresho bishya byo gukingira no gushariza inyubako, bikundwa n'abubatsi benshi. Imbere hari ibikoresho bitandukanye bifite ubucucike bwinshi, nka pu, eps, pir n'ibindi. Ubuso bw'icyuma butwikiriwe na AL-ZN. Kandi ku gukingira, kurinda umuriro no kwirinda ubushuhe, ibikoresho byo hasi bikoresha urwego rwa aluminiyumu, rufite imikorere myiza ku gukingira no kwirinda ubushuhe.
