Art Spectrum Pigmented Inks are acrylic based, fast drying, lightfast, water-resistant, non-toxic, intense colours with a smooth even flow that can be used as transparent washes, layered tints or bold fields of strong colour. Art Spectrum Pigmented Ink range includes transparent and opaque colours. As they are an acrylic pigmented ink, they will not fade like traditional dye based inks and will intermix cleanly. Use with brushes, drawing and calligraphy pens and airbrushes on most clean, non greasy surfaces such as paper, board, wood and primed canvas. Ideal for multi-media artwork. Colours available in 50ml glass bottles with a pipette and 500ml refill plastic bottle. Ultra Black is also now available in 100ml's. *Always shake well before use Art Spectrum Pigmented Inks (acrylic based) are clean, bright, strong, intense colours that mix into clear epoxy resin extremely well. The acrylic inks are fast drying, water resistant when dry and have an exceptionally smooth flow.