Phakathi kwezinto zokwenziwa ezimbonini, izindwangu ezingalukiwe zinezici zokusebenza kahle kokuhlunga, ukwahlukanisa, ukufudumeza ukushisa, ukumelana ne-asidi, ukumelana kwe-alikhali, kanye nokumelana nezinyembezi. Zisetshenziselwa kakhulu ukwenza imidiya yokuhlunga, ukwahlukanisa umsindo, ukufakwa kagesi, ukupakisha, ukufulela nezinto zokwakha, njll. Umkhiqizo.