Liquitex Professional Acrylic Ink comprises super fluid, intensely pigmented acrylic colors for all of your creative uses. They're water resistant, fast drying, non-clogging, and permanent, so they won't smear or fade. Professional Acrylic Ink is intermixable with all other Liquitex acrylics and mediums. Available in 30 ml dropper bottles and 150 ml bottles.