1.目的和范围1。1本试验方法用于测定桩地板覆盖物上酸性食品颜色的耐染色性。2.原则2。1用少量稀释的食品药品和化妆品（FD&C）红色40水溶液（调节至酸性pH值）对桩地板覆盖物样本进行染色。在使染色样本在受控条件下保持24±4小时后，将其在水中冲洗，以去除所有未使用的FD&C红色40染料。干燥后对任何残留污渍进行评估。

1. Purpose and Scope1.1 This test method is used to determine the resistance to staining by acid food colors on pile floor coverings.2. Principle2.1 A specimen of pile floor covering is stained with a small volume of a diluted aqueous solution of Food Drug and Cosmetic (FD&C) Red 40 adjusted to an acid pH. After allowing the stained specimen to remain at controlled conditions for 24 plus or minus 4 h, it is rinsed in water to remove all unused FD&C Red 40 dye. Any residual stain is assessed after drying.