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Use PC and TLC to identifying the dyes of the Sheaffer Black Ink and the standard Parker Pure Black Ink, which composed from two dyes:Brilliant Black BN(CI. 用紙色譜法和薄層色譜法鋻別犀飛利黑墨水和標準派尅純黑墨水中的兩種染料均爲：亮黑（CI。