The sketchINK® series includes inks in 10 different colors offering great flexibility. In addition to being used in pens, they can be used for painting with a brush. They are extremely waterproof and dry quickly. Rohrer & Klingner uses nano pigments to allow optimal ink flow. The sketchINK® is ideal for drawing fine outlines, which take less time to dry and are ready for painting. It can be mixed with water to create brilliant highlights, making it the ideal companion for Urban Sketchers. It is an excellent choice for designers, graphic artists, and architects. Offered in 50ml glass bottles.