This Educational Colours Drawing Ink can be used for calligraphy, painting, scrapbooking, card making and more. It's lightfast so it won't fade over time and water resistant making it durable and long lasting. The colours are highly pigmented for bright and vivid artworks and are intermixable so you can create your own unique hues and shades. It's water resistant and lightfast so your artwork will last for years to come. It's highly pigmented so you can enjoy bright works of art. There is 30 mL of ink in this bottle. The colours are intermixable so you can create your own hues. This ink is Cobalt. It can be applied with a brush, technical drawing pen, calligraphy nibs or an airbrush. This ink is ideal for calligraphy, painting, scrapbooking and card making.