Liquitex 4260238 Professional Acrylic Ink - Iridescent Copper44; 30 ml. Liquitex Professional Acrylic ink is an extremely fluid acrylic ink that uses super fine pigments suspended It dries quickly&#44; are permanent&#44; water resistant and non-clogging&#44; which makes them ideal It is extremely fluid&#44; no need to dilute for airbrushing or calligraphy. It has superior water resistance. Ideal for watercolor effects&#44; color blocking and under painting.