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.
Crayon Tinting. Using crayons for tinting embroidery is the most common technique. It's easy to learn and most people have at least a few crayons around. Crayons produce a bold color, but you can also work more gently with them, resulting in a lighter tint. Just like coloring on paper with crayons, varying the amount of pressure and layering your coloring creates some very cool shading. That shading gives your embroidery texture and dimension, and it's fun to use with modern or vintage designs.