Excellent water and lightfastness and will not run through the water and fade so you can rest assured of your important documents. Water-based marker that will not bleed through when line marker is pulled from the top. Ink Color: Black; Line Width: 0.05 mm; Ink: Water-based pigment (water resistant); Cap type water based marker with clip function; Total Length: 5.3 inches (135 mm); Product conforms to AP mark safety standards; Complies with international standards ISO11540