Sharpie Accent Gel Highlighters feature SmearBlock gel technology that provides total smear protection across pen, marker and inkjet inks. Smear-protection includes ballpoint, roller and gel pens. Highlighter works on all paper surfaces including glossy, rice (Bible pages), and vellum papers. Gel ink will not bleed through papers or dry out. Bold fluorescent colours include fluorescent yellow, fluorescent pink, and fluorescent orange.