Step 7. Contour Shading To give the drawing its three dimensional appearance we need to add the different degrees of shading and these shading strokes are determined as we continually scrutenize the color print, and make judgements as to the darkness of each area. The shading can be divided into 10 grades as below:   1. is left white. 2. is vertical shading only with Pilot fine point pen. 3. is additional 45º shading at 3mm pitch, with Pilot fine point pen. 4. is additional 45º shading at 3mm pitch (the other way) with Pilot fine point pen. 5. is additional 45º shading at 1.5mm pitch with Pilot fine point pen. 6. is additional 45º shading at 1.5mm pitch (the other way) with Pilot fine point pen. 7. is additional 45º shading at 3 mm pitch with Felt Tip Pen 8. is additional 45º shading at 3 mm pitch (the other way) with Felt Tip Pen 9. is additional 45º shading at 1.5 mm pitch with Felt Tip Pen 10 is all black with Magic Marker. There is a blend between grades 9 & 10. Features such as eyebrows and nostrils can be added, also the general eye hollow and lashes. Then add the dark-side shadow and under chin shadow. We are adding shadow a little at a time so that if we overdo something we can work around it and bring up adjoining shading. Corrections are seldom necessary, but if they are, since we will finally photocopy the drawing, we can stick on a piece of paper over the wrong bit, and blend it in carefully. Gradually the face will begin to look rounded instead of just two-dimensional. After this stage we can erase the pencil outlines of the face.   This concludes Step 7. Contour Shading