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用纸色谱、薄层色谱法鉴定出Penman牌派克黑墨水中含有5种染料:亮黑(Brilliant Black,C.I.28440,C.I.FoodBlack1)、亮蓝(Brilliant Blue,C.I.42090,C.1.Food Blue 1)、坚牢黄(Fast Yellow,C.I.13015,c.I.Food Yellow2)、日落黄(Sunset Yellow,C.I.15985,C.I.FoodYellow5)及紫6B(Acid Violet 6B,c.I.42640,C.I.FoodViolet