One of the oldest and most relevant drawing techniques. In the Middle Ages pen drawings were done with a feather (quill-feathers of goose, swan, raven etc.), since the Renaissance mostly with a reed pen with a forked tip. In the 19th century, metal feathers became the main tool for pen drawings along with various types of ink. The oldest of these is the black gallus ink that turns brown when drying. Another favourite ink was Biester, a brown tusche made from soot as well as black tusches and coloured tusches. From the 18th century onwards, the brown-blue sepia ink came into use. Paper, initially only white paper, was used as image carrier. During the Renaissance artists started using coloured paper to enhance the effect of the drawing.