Ukwenza ngokushisa okushisayo kuyinto isikhathi esinamandla ekwenzeni izinto zemetal njengezinkuni, izinkuni kanye nezinye izinto eziningi ezikwazi ukwenza izinto zokuphatha. Ukwenza ngokushisa, okwenziwe njengokuphatha ngokushisa, ikhetha isikhathi eside esikhishwe kwi-slug yemetal ekwenzelwa ngokushisa ekwenzeni isimo esithandwayo. Isikhala sokuphatha sikwazi ukwenza isikhathi esinamandla, ekwenzeni isimo esithandwayo esakhiwe ekhaya ekwenzeni ishape ekwenzelwa kwi-die yekhabide.

Amakhemikhali okuhlobisa abasebenzisi abahamba phansi ukusuka kuqembu lwe-A kuze ku-B kuze ku-C. Ngakho, indawo engcwele kakhulu ikhona ku-A, ekufolweni ngu-B, futhi indawo engalungileyo ikhona ku-C ngoba i-B no-C bayalingana nge-A.

Ukuze kwenzeke ukulondoloza isikhala kahemikhali ukungathintwa kahle, kunezinto ezithile ezikhona endleleni. Ibhokisi lingathatha isikhala esiningi ukuze kwenzeke ukuphucula isikhala sonke isikhala esikhundleni futhi kusiza abasebenzisi ukudlulisela imali.