This is a drawing in India ink (Rapidograph and Higgins) and color pencil (mostly Prismacolor) on a vellum paper of 100% rag (Staedtler), which is translucent.
The paper is apparently used most frequently for engineering drawings. The paper has a beautiful feel (which is virtually erotic) when you
apply ink, graphite, or colored pencil to it. And because it's translucent you can assert effects on one side that exhibit themselves on the other side.
It erases very cleanly so it remains largely unsullied by my touch. The BlueCamy Reversed image is of this drawing in the obverse view. 9x12 in.