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Similarly, the use of hypochlorite bleach to clean Tiffany Elsa Peretti Sevillana drop earrings surfaces prior to finishing is not recommended because it may reduce coating adhesion. Optimized decolorization treatments, therefore, needed to be evaluated for changes in coating adhesion, since the appearance-grade material produced by decolorization treatments might well be finished with a transparent coating. Tiffany Cushion work investigated the ability of intense UV light exposure to decolorize blue stain with and without hypochlorite bleaching.Several kiln-dried lodgepole pine heartwood and bluestained sapwood boards affected by the mountain pine beetle were obtained and cut into 15 by 6.5 by 1 cm test coupons. The 6.5 by 1 cm end grain Tiffany Elsa Peretti Sevillana earrings each coupon was sealed with two-part epoxy resin (Intergard 740, International Marine Coatings). One side of each coupon was selected as the test face (for sapwood samples the side with the greatest degree of staining was selected) and imaged using a Canon LiDE 600F scanner. Before treatment, brightness Tiffany Elsa Peretti Sevillana lariat color measurements were taken at 10 points on the test face of each coupon using a Minolta CM700 d spectrophotometer. The coordinates measure color on three axes. L* represents the brightness where 0 is black and 100 is white. Negative a* values indicate green, while positive a* values indicate red. Negative b* values indicate blue, while positive values indicate yellow. Three heartwood and three sapwood coupons were randomly distributed into one of 16 treatment groups.