FELT TIP+GREY MARKERS

(on bond)

​

Adding tone to a felt tip sketch quickly adds depth and volume. I suggest limiting it to three tones(10%, 30%, 50%) and building up layers. Start with the 10% to first define the general shape and then use the 30% to build up darkness. The 50% is left for the end if there is a need to accentuate the cast shadow side of a shape. Try to stay away from using a "100% black" unless you are outlining something.