These concentrated dye-based inks from Dr Ph. Martin have been the favourite of designers, illustrators and artists since 1934. Radiant inks are formulated to have the greatest possible brilliance, however they have limited lightfastness. Ideal for work to be reproduced, Radiant inks can be used with brush, pen or airbrush and are non-toxic. There are 56 colours in 15ml bottles with dropper.