Determination of Effects of Primer Surfacer Properties on the ‎Automotive Coating Appearances by DOE

I n general, the evaluation of ‎automotive coatings appearances ‎favors (is considered ‎preferentially) more than chemical ‎and physical properties. Therefore, ‎its improvement is most required. ‎Studying appearance by means of ‎QMS-BP technique, in which it ‎measures some of the most ‎important coating appearance ‎factors, such as: the specular ‎gloss, distinctness of image (DOI) ‎and orange peel. In this article the ‎influence of variation in the primer ‎properties, such as thickness, ‎roughness and gloss on the ‎appearance of final coating system ‎for two different primer types was ‎studied. Results showed that ‎increase in specular gloss would ‎cause the intensification of NAP ‎‎(Niveau d’Aspect Peinture) values, ‎while increase in thickness and ‎roughness would decrease it. ‎