161st day of 2016.I have done this research waaaay waaaay back, but never really documented it nicely. So, I drew it nicely with the Graphitone 2B and I realized that... Graphitone is not easily erasable. When it is dry, it still leave some marks on the paper, giving it a leeway the paper may have more tooth. But when it is wet... it is unremovable! O__O
