Review of instrumental inter-agreement study of spectral and colorimetric data of commercial multi-angle spectrophotometers

"This is the peer reviewed version of the following article: Perales, E., Micó-Vicent, B., Huraibat, K., Martínez-Verdú, F. M., Dietz, C., & Yamanoi, Y. (2019). Review of instrumental inter-agreement study of spectral and colorimetric data of commercial multi-angle spectrophotometersspectrophotometers. Color Research & Application, 44(2), 168-175., which has been published in final form at https://doi.org/10.1002/col.22320. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving." [EN] Several different instruments have been introduced into the market to obtain good color characterization for different measurement configurations. These commercial instruments have different optical and working configurations, however, the measurement data provided by each instrument should be similar to have good consistency when comparing them to each other measuring the same sample material. Therefore, the purpose of this work was to apply an inter-model agreement study of spectral and colorimetric data of three instruments (CM-M6, BYK-mac-I, and MA98). Two different statistical tests were applied following ASTM recommendations. In general, the measurement geometries close to the specular direction and the flop direction showed greater deviations. In addition, the partial color differences calculated for the comparison of MA98 versus CM-M6 were larger than the BYK-mac-i versus CM-M6 comparison. Finally, it can be concluded that most of the measurement geometries were statistically significantly different from each other which means that these differences were due to systematic or bias errors and not exclusively to random errors. EMRP, Grant/Award Numbers: Bidirectional reflectance definitions (16NRM08), 16NRM08; Spanish Ministry of Economy and Competitiveness, Grant/Award Number: DPI2015-65814-R; Ministry of Economy and Competitiveness, Grant/Award Number: DPI2015-65814-R; European Union; EURAMET Perales Romero, E.; Micó-Vicent, B.; Huraibat, K.; Martínez-Verdú, FM.; Dietz, C.; Yamanoi, Y. (2018). Review of instrumental inter-agreement study of spectral and colorimetric data of commercial multi-angle spectrophotometers. Color Research & Application. 1-8. https://doi.org/10.1002/col.22320 Streitberger, H., & Dössel, K. (Eds.). (2008). Automotive Paints and Coatings. doi:10.1002/9783527622375 Akafuah, N., Poozesh, S., Salaimeh, A., Patrick, G., Lawler, K., & Saito, K. (2016). Evolution of the Automotive Body Coat