... economical.1.Top technology,greenness and healthinessThe ink of V-CLEAR,extracted from natural plants,has no deleterious chemical components,and conforms ... mouth.2.Write freely,wipe off easilyThe ink of V=CLEAR,takes the lead in adopting the "New Photosensitive Hydrolyze Technology ... 's doodling on anywhere.3.Repeatly used,economy and beneficalV-CLEAR doodling pen,with the durability of 1 year,can be ...