Yupo Ultra is a unique alternative to traditional art papers. It is a synthetic paper, made of 100% polypropylene and is waterproof, stain resistant, and extremely strong and durable. It features a non-absorbent, ultra-smooth surface that resists tearing and buckling and remains perfectly flat, eliminating the need for soaking, stretching or taping. The non-absorbent surface allows watercolours and acrylics to sit right on top of the paper, providing beautiful, watery affects that are unachievable on any other paper. Pigments applied to the ultra white sheet retain their true clarity and brilliance making the colours more vibrant and brilliant than standard papers .Yupo synthetic paper can withstand multiple erasures and it can even be run under a tap to erase watercolours. It also holds pen and ink lines with razor sharp precision and markers work beautifully on the unique surface as well.