The ragged edge of the sheet of paper is known as a "deckled edge".
This photo shows the effects of different writing implements on handmade post-consumer recycled paper (without any size added). Adding some sizing (such as gelatin) into the pulp would make the paper less likely to soak up all your brush contents in one go, and cut down on feathered edges on ink lines.
This photo shows the effects of different writing implements on handmade post-consumer recycled paper (without any size added). Adding some sizing (such as gelatin) into the pulp would make the paper less likely to soak up all your brush contents in one go, and cut down on feathered edges on ink lines.


