We recently reported on various techniques we have developed for accurate characterization appearance changes brought about by scratch and mar damage. Scratch and mar resistance is related to the ability of a coating to resist deformation. The appearance change is brought about by the scratches and by roughening, which in turn leads to a reduction in gloss and reflectivity. Marring can be minimized by the appropriate use of the wipe material employed. This paper reports on three common wipes used by the automotive industry and focuses on the measurement of the appearance of coating by image analysis.
References
1.
PourdeyhimiB., WangX., and LeeF., “Evaluation of Scratch and Mar Resistance in Automotive Coatings: Nanoscratching by Atomic Force Microscope,” European Coatings Journal, (3), (1999).
2.
PourdeyhimiB. and WangX. and LeeF., “Making Scratch Resistance Visible,” European Coatings Journal, (4), (1999).
3.
LeeF., PourdeyhimiB. and AdamsonsK, “Analysis of coatings appearance and surface defects using digital image capture/processing/analysis system.”
4.
HillL.W., KorzeniowskiH.M., Ojunga-AndrewM., and WilsonR.C., Progress in Organic Coatings, 24, 147 (1994).
5.
GregorovichB.V. and HazanI., “Environmental Etch Performance and Scratch and Mar of Automotive Clearcoats,” Progress in Organic Coatings, 24, 131 (1994).
6.
GregorovichB.V., McGonigalP.J., FC93–395, SME Technical Paper (Series), Finishing ‘93 Conf., Cincinnati Ohio, 1993.
7.
PressW.H., FlanneryB.P, TeukolskyS.A., and VetterlingW.T., Numerical Recipes in C; The Art of Scientific Computing, Cambridge University Press, Cambridge, (1988).
