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The Dyes Analysis of the Sheaffer Black Ink and the Standard Parker Pure Black Ink

Qi Zongshao (Guangzhou Pharmaceutical school.Guangzhou,510430,China)  
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.28440,CI.Food Black 1)and Fast Yellow SX(CI.13015,CI.Food Yellow 2).Use spectrophotometry to determineing above two dyes.This method is simple and exact.
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