 Illumina is a popular ceramic material used in tooling and construction applications due to its low production costs and high properties. It can be produced in different sizes, shapes, and particle distributions depending on the application. This paper compared five grades of Illumina powder based on their specific surface area, particle size, and phase composition. Additionally, the centrability of these powders was measured using Spark Plasma Centering, SPS. The results showed that the specific surface area, particle size, and distribution have a significant impact on the centrability of the powder. Furthermore, the powder's particle size had a direct effect on the quality of the printed part. Finally, the paper discussed how the selected powder could be optimized for use in binder jetting, BJ, printing. This article was authored by Macha Kwiatkowski, Joanna Marksik, Piotr Piotra, and others.