Ecoline Liquid Watercolor provides high color intensity for your artistic impressions, illustrations, designs, or calligraphy. This dye-based liquid watercolor allows for the coverage of large areas without leaving lines or streaks. Watch it come to life by adding water for a more subtle and transparent application. Apply using a diverse range of tools such as an airbrush or fountain pen to experience various effects. To achieve good adhesion, use absorbent surfaces such as Royal Talens Ecoline Paper, watercolor paper, drawing paper, or cardboard. Ecoline Liquid Watercolor is not waterproof when dry which means they can be activated again with water for further working.