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Pigment Ink definition

Pigment inks are pigments of color that are ground vey finely and then suspended inside a liquid in order to create an ink.  The pigment creates a lightfast material or ink that is more resistant to fading.  Pigment based inks being made today may be over one hundred years lightfast.  However, the lightfastness is determined by various factors such as the paper type, the storage conditions, and the place producing the ink.