Question…
What blue color (dye or pigment) is used in fountain pen Ink so it is easily removed by liquid Ink Removers?
What blue color (dye or pigment) is used in fountain pen Ink so it is easily removed by liquid Ink Removers?
Please tell me the name of color (dye or pigment) which is used in the commercial preparation of fountain pen Ink?
Answers…
Answer by Etienne de Quercy, Big Pointure!
see the Pearson’s chi square test
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