WHITE PAPER Figure 8c shows an image of the back of the brush, which has a poor surface finish. Closer inspection of the brush surface shows the presence of numerous surface defects all of which are potential contamination traps (Figure 8d). Figure 9a shows the UV lotion remaining on the fused brush product after brush cleaning. Contamination traps at the base of the bristle bundles, and around the areas where the bundles are fused into the brush block are clearly evident. Much of the UV lotion has also been retained by the surface of the brush due to the poor surface finish (Figure 9b). Figure 8c. Back of the fused bristle brush, poor surface finish. Figure 9a. UV lotion remaining on the fused brush product after brush cleaning. Figure 8d. Close up image of the surface of the fused bristle brush - potential contamination traps. Figure 9b. UV lotion retained by the brush surface - poor surface finish. Vikan A/S - Department of Research & Development © Vikan A/S. Published, 2015. Revised, 2023 08
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