Colours come in 25ml plastic bottles. Alcohol-based dye ink. Dye inks are not the most lightfast. Sensitive artworks should be kept out of direct sunlight or sealed with a UV resistant top coat.
Kurecolor markers can be refilled through the tip and on average you should be able to refill one pen six times from one refill bottle. By using the refill blender you can create various gradation effects! The refill inks can also be used with an airbrush.
Alcohol-based inks are great for ink paintings on glossy surfaces like tiles!