Ink could be designed out of the fruit from berries (which provides several different hues) or it can be made from soot. When I was younger I produced it from soot, but since the fruit berry ink doesn’t get commencing fires we will try out that method this time! https://howtodrawaquillpenwithink00876.blognody.com/36176822/the-greatest-guide-to-realistic-quill-pen-drawing