They can be mixed together and used as is or diluted to create a multitude of new shades, from the brightest to the most pastel. The 4 fluorescent colours (blue, yellow, pink, green), the 3 metallic colours (silver, copper, gold) and the white are opaque and covering and should preferably be used concentrated. These inks can be used with a brush, penholder or airbrush on drawing paper, watercolour paper or cardboard. They are available in 50ml with a dropper to facilitate and control the flow of ink. Elegant and voluptuous, the glass bottles have a wide base for optimal anchoring on the work table. Keep your work away from light to preserve the vibrancy of the colours.