Thanks Paul, I've never used Bristol but the paper I use is smooth. I am always looking for texture techniques for skin so atm I put down the base tones and blend with a tissue, then I build up the tones over that. The top layers aren't blended. I generally only use HB ad 2B.
Bristol Board is extremely smooth and is sometimes difficult to get a realistic texture on (for me!). I have used a rough paper for drawings (not on DA yet) that give an almost grainy texture to skin, and just wondered if that was how you achieved the texture in this drawing - but obviously not I have a Canson pad lying around somewhere - I will have to give it a try