I've added Kevin's right eye and am working on building up the tone. I layer initial tone using 4H lead. I am using a circulism technique (drawing in tiny tiny circles very close together) then I blend using a medium tortillion also in a circular pattern. I then take a cotton swab and blend again, this allows me to soften the tone a bit more and gives a more smoother transition from dark to light tone. I then add another layer of tone using a 2H lead then I repeat the blending process.
For the eye, I took a mechanical pencil with a 2B lead and darkened the edge around the iris and I add light tone. I darken the pupil but I'm careful not to lose the catch light. I blend again using a medium tortillion then a cotton swab. I then take a hake brush and brush the entire drawing. I feel that using the hake brush gives the drawing a polished look which I personally like.
This is 11 x 14 graphite on Strathmore Bristol Vellum
Another update will be coming soon!