Natural magnesium iron chromite can be used as a pigment for coloring high-sintered porcelain tiles. However, it is important to control the amount, firing time and temperature, and size distribution of the chromite powders to produce different color shades of the fired tiles from gray to black.
Preparation end properties of fast-fired porcelain tiles containing natural chromite / Corradi, Anna; Leonelli, Cristina; Manfredini, Tiziano; Pozzi, Paolo; Romagnoli, Marcello. - In: AMERICAN CERAMIC SOCIETY BULLETIN. - ISSN 0002-7812. - STAMPA. - 72(5):(1993), pp. 63-69.