Mepụta ihe dị mgbagwoju anya nke ahịrịokwu a A na-ewepụta ọla site na isi mineral ya site na usoro Kroll ma ọ bụ usoro Hunter.
N'ezie, nsụgharị dị mgbagwoju anya nke ahịrịokwu ahụ bụ "A na-ewepụta ọla site na isi mineral ya site na usoro Kroll na Hunter. Ngwakọta a kasị ahụkarị, titanium dioxide, bụ ihe na-ewu ewu nke na-eme ka ìhè na-agbasa, a na-ejikwa ya emepụta ihe ndị na-acha ọcha".