In the “Braunschweig International Graduate School of Metrology” (B-IGSM), about 50 doctoral students are dedicated to the science of precise measurement. They are all supervised both at Technische Universität Braunschweig and the Physikalisch-Technische Bundesanstalt (PTB). At PTB, Irina Santourian conducts research at the gonioreflectometer, a measuring station that measures light reflections. In an interview, the doctoral student explains how she would like to improve the German standard for white and gray shades.