Tombow ABT 623 Dual Brush Pen - Purple Sage Waterbased (odourless) Watersoluble Non-Bleed Non-toxic Acid free Dual Brush Pens feature a marker with a flexible, nylon brush tip and a fine tip all in one. The brush tip works like a paint brush to create fine, medium or broad strokes by a change in brush pressure. The fine tip draws consistent, smooth lines for borders, graphics and detailed drawings. Use the fine tip to add sharp details with no fraying at the tip. Both the brush and fine tips can be used to blend the colours acting like watercolours. Simply apply a darker color using the brush tip to a plastic sheet. Take a lighter color pen and dip the brush tip into the darker colour. With each stroke the pen creates a two color effect with dark to light hues. Ideal for colouring, fine art, illustrations, doodling, journaling, hand lettering and more. Journaling and Calligraphy are a popular use for Tombow pens.