The ZIG Brushables from the ZIG Memory System line have two brush tips and two tones per marker. One tone comes from the ZIG Memory System color range while the other is a 50 percent tint of that color. These pens are water-based, pigment, permanent, lightfast, and acid-free, making them suitable for use on paper and even photos. Their flexible felt-tip allows for brush techniques and two-toned blending effects. Each marker is also acid-free and photo safe with two tones. * Water based ink * Acid free, lightfast & photo safe * Set of 6 pastel colours * Doube ended brush tip * Made in Japan **About Kuretake** Established in 1902 as a sumi ink stick manufacturer in Japan, Kuretake has grown in to a brand of quality artist tools for fine arts, illustration, graphic design, paper crafts, scrapbooking and signage. See other Kuretake products we stock here