Sadiek1394 Sadiek1394

20-02-2020
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Why do we mark tlc plates with pencil and not with pen

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kerrie95 kerrie95

20-02-2020

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You can't use a pen because the ink will travel up the TLC plate with the TLC solvent, just like your chemical samples do. You can only spot/label/mark TLC plates using a pencil. The graphite in a pencil will not run up the plate!

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