A dark liquid ejected for defense by most cephalopods, including the octopus and squid. Ink is made up of really concentrated melanin. Artists have diverse mediums they use to create their artwork, with a single such common medium staying ink. Ink pens, or dip pens, are generally used to https://howtodrawwithinkpens07283.ja-blog.com/36692416/top-latest-five-ink-pen-drawing-techniques-urban-news