The reddest iron oxide pigments ever

 
Bright, yellow shade red iron oxides can be synthesized in a number of ways. The predominant manufacturing route is the Penniman process which is primarily used in China. The quantity of pigment produced by the Penniman process accounts for almost 1/3 of the total global market for synthetic iron oxide pigments. In the following presentation, several possible production routes are described and we will focus on a new modified version of the Penniman red process which can be used to achieve a highly saturated red iron oxide with a yellow undertone. Several options to control the Penniman production process will be discussed with the aim of reaching targeted color values. Comparisons between Penniman reds and bright, saturated reds from alternative manufacturing processes will be discussed.