These extremely fluid essentials acrylic ink colors are vibrant, quick drying, permanent and water resistant. They have a thin, watery consistency and are excellent on paper, canvas, wood, or metal. These acrylic inks can be applied with a brush, dip pen, or an airbrush. Royal & Langnickel Acrylic Art Ink Neon colors 6 bottles permanent 30ml NIB. water resistant, non clogging.