Color Collection by Intensity Fineliner Marker Pen provides vibrant colors and bold, crisp writing. This pen is perfect for writing, doodling and drafting and great for adult coloring. The water-based ink won’t bleed through paper (Results could vary based on paper characteristics). Pen Sub-Brand & SKU Line: Intensity; Pen Style: Stick; Pen Type: Porous Point Pen; Refillable (Yes/No): No.