Acid-Free Watercolor Paper: Made from premium wood pulp paper, high in fiber, featuring 140lb /300gsm pages, thick and robust. Every sheet of this watercolour paper pad is acid-free, meaning it will not deteriorate over time keeping your paper natural white and colours bright.Different Textures on Front & Back Page: Cold press on front page makes the surface to be Coarse-Grained, which stand up to multi-layers without warping, tearing, thinning or bleeding through; Hot press on reverse page makes surface to be Fine and Smooth, which is not suitable for multi-layer flat/thick coating, but great for small and delicate painting.For Wet and Dry Media: With alternating smooth and textured pages, you can mix up the effects on your creations. Works well with all wet media including watercolour painting, water brush pens, alcohol markers, oil pastels, as well as coloured pencils and dry media.Spiral Binder Bound: The spiral bound design allows you to fully flip back pages for easy workable surface without any obstructions. Sheets are detachable, enabling your great masterpieces to be detached, shared and displayed without damage.For All Types of Artists: Looking for a cold pressed watercolour pad to create mixed media with? This watercolour paper pad is perfect for any kind of artist. great for wet and dry painting( the course side is for wet painting), can make the effect of water stain,water mark.