Products / W & N Watercolor Postcards
The Winsor & Newton Classic Watercolor postcards (4 x 6) features superior absorbency and resilience. Made from high quality 100% cotton (300 g / 140 lb), it is perfect for your watercolor art. It's recommended to spray a UV-Resistant Clear acrylic coating (easily found in art supply stores) over artwork before mailing...but certainly not necessary. First Class US shipping included.