After a few attempts at value studies with my new Ciao Copic Markers I realized I needed to make value charts and identify my markers by value according to my five step and seven step value scales.
I have only a small selection of markers, mostly warm and cool grays. I evaluated the value of each marker considering both a single stroke and a double stroke of each marker.
Note that my value scales run off the edge of the page. My marker strips also run off the edge of the strip so that I can more easily compare the values.
After deciding where the value of each marker, for both one stroke and double stroke, I complete my five step and seven step value charts for easy reference. It is difficult to use the markers effectively when I try to judge the value by the caps on the markers.
Simple value scale landscape sketches are much easier using my reference charts.