Discussions tagged with 'particle size' MariaGarcia Help with particle size, please MariaGarcia replied 2 years, 7 months ago 2 Members · 2 Replies Formulating Anonymous Particle Size Testing and Raw Material Testing in General for cosmetics (chemistry, physical, etc). Mike_M replied 8 years, 11 months ago 3 Members · 5 Replies Advanced Questions Zink Optimal Titanium Dioxide particle size for concealers? Zink replied 9 years, 7 months ago 3 Members · 3 Replies Formulating Viewing 1 - 3 of 3 discussions