Marka laga eego aragtida caafimaadka aadanaha, nickkicle 400 oo layaab leh indhoole, oo loo isticmaalo in lagu nadiifiyo, oo loo isticmaalo ama wax laga beddelo nidaamyada tuubooyinka si buuxda u xakameynaya acid hydrofluoric acid, oo mar labaad, waa sunta xiridda.