Pigment Inks
Pigment ink is water and lightfast so it wont bleed through the water, and the drawing line will not fade and leaves vivid drawings.
Water-resistant: Pigments are a material that does not dissolve in water, so they will not lose their drawings even if they are bent out.
Lightfastness: Pigments are resistant to UV rays and other irritations caused by dyes, and are resistant to fading.