Brushes, ContinuedBrush bristlePaint brush bristles or hair have flattened, split ends called flags. The flagsnomenclatureenable the bristles to trap pigment and move it around. The end of theand testingbristles, enclosed by the ferrule, is referred to as the butt. Here brushdeterioration generally begins with trapped pigment rotting the bristles. Whenjudging bristle elasticity, you should bend the bristles at a 45-degree angle toa horizontal surface and observe where the bristles bend. The bend shouldoccur approximately 1/3 the length from the ferrule. The bend of the bristleis called a heel. A brush that is too stiff to bend or bends too near the tip isan inferior brush.Figure 1-15 shows bristle nomenclature.Figure 1-15.—Bristle nomenclature.Continued on next page1-26
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