Paste paper is one of the oldest decorated papers used by bookbinders, and can be found in books that are centuries old. Going back hundreds of years (and continuing today), sometimes bookbinders would use up their leftover bookbinding paste by throwing some pigment into the paste and brushing it out on some paper to make decorative papers to then use in bookbinding. They would then make strokes or stipple patterns with a brush in the paste, or use a tools to draw or comb designs in the paper and let it dry. One of the distinctive qualities of paste paper is the rich 3-dimensional patterns and designs. This is achieved because when the paste is first applied to the paper and a pattern made in the paste, it is thick, with peaks and valleys. As the paper dries, the paste is sucked flat into the paper, leaving a 3-dimensional pattern on a 2-dimensional surface.