These extra sheet of paper will stop your coloring being affected by the texture of the surface you are working on. Colored pencils will easily pick up even the smallest dents, divots or wood grain textures. For smoother coloring give your page that little extra cushion! It is also useful to add paper between your page and the next when you are using a coloring book, the paper protects the design underneath from being damaged.
As the Huffington Post points out, coloring books for adults are best sellers in France and the U.K. Hachette, a French publisher, has even capitalized on the trend by selling a 20_volume collection of stress_reducing coloring books called Art_Thérapie. Using coloring books to de_stress has been especially popular amongst French women, who have even taken to posting their creations on social media and forming Facebook groups to share coloring tips.