3 . 31 . 2015 ... Wanted to work up a nice little sepia toned graphite sketch using Derivan liquid graphite and a spattering of a mixture of yellow ochre/raw umber watercolor. This is the result from this morning in my studio... an 8" x 11" ...had it finished in under an hour minus a little drying time.... pretty quick work time with the Derivan, painting straight from the bottle and putting it to paper.