Brilliant, water-proof, lightfast colours, suitable for most surfaces. Unlimited mixing potential.Large 50ml (almost 2fl. oz.) bottles.Liquid Spectrum bottles are fitted with a convenient non-spill stopper to prevent accidental spillage. From this, ink can be dispensed drop by drop or in a steady stream into palettes, airbrush reservoirs etc. If you wish to access larger quantities of ink or use a dip-pen or brush, simply remove the stopper by inserting the point of a skewer (or similar object) into the hole and gently levering out.Liquid Spectrum concentrated colours allow easy and unlimited colour mixing. The 'non-spill' stopper makes drop by drop dispensing of colour easy. No more clogged pipettes! Many superb colours can be obtained with simple 1:1 or 2:1 mixes if the basic colours. Opaque pastel shades can be obtained by adding equal amounts of white to a colour, or create a beautiful range of metallics by adding one part colour to four or five parts Pearlescent.Liquid Spectrum is a non-toxic, acrylic based artists' colour. It is suitable for use with brush, pen, colourshapers or airbrush and will adhere to most clean, non-greasy surfaces including paper, board, metal, glass, certain types of plastic, acetate and fabric.