A dark liquid ejected for protection by most cephalopods, such as the octopus and squid. Ink is made of very concentrated melanin. Most fineliner pens take place to become water-resistant, which means the artist can experiment with unique mediums like watercolor or ink washes immediately after their Preliminary sketch. https://inkdrawingforbeginners05825.tblogz.com/top-guidelines-of-how-to-draw-with-ink-pens-49921447