However, as I began to work on the multiple layers, I quickly found the vellum isn't quite translucent enough to achieve I color I need to show through on multiple layers. The vellum is smooth and takes the pencil beautifully, colors are rich and intense on the surface. What I like about the translucency of the vellum is that I am able to work with the colored pencil on both sides. The smooth surface only allows minimal layers of pencil and if I've saturated the front, I turn the sheet over and continue on the opposite side to achieve additional color and value. It is also easy to erase mistakes with a drafting eraser and I've also heard rubbing alcohol will remove smudges and fingerprints but haven't tried it just yet.
What I have learned so far ... I'm going to have to adjust my layering process. I may only use two sheets of vellum instead of three. I may add more of my composition to the top layer and let it fade into the next layer. It's trial and error as I work but learning and enjoying the process.