A bismuth oxychloride effect pigment exhibiting improved light stability has a discontinuous coating of hydrous iron oxide on the crystals of the bismuth oxychloride. The pigment is prepared by growing the bismuth oxychloride crystals, adding a hydrolyzable iron salt thereto and then hydrolyzing the iron salt.

Um pigment do efeito do oxychloride do bismuto que exibe a estabilidade clara melhorada tem um revestimento discontinuous do óxido hydrous do ferro nos cristais do oxychloride do bismuto. O pigment é preparado crescendo os cristais do oxychloride do bismuto, adicionando um sal de ferro hydrolyzable a isso e hydrolyzing então o sal de ferro.