It is a watercolor paper that has been produced on the famous traditional cylinder block making machine for hundreds of years, and it has the look and feel of handcrafted paper. The paper is made of 100% cotton, which gives it superior absorbency and superior strength to withstand repeated layers of drawing and wiping. Internal and surface scaling allows for dried color to be lifted and the opportunity to enhance and reformulate watercolors, and pigments are brighter and purer. The color of the paper is natural white, acid-free and made entirely without bleaching agents, for optimum preservation over time. Weight or thickness: 850 and 640 grams The paper has three grades of texture projection of cold pressed, hot pressed and strong, broadened raw grain. Recommended techniques are perfect and customized: Watercolor