550 Series Fluorescent Colours Plastisol Inks are available in a range of popular, ultra high opacity colours for direct screen printing. In most cases, 550 Series Fluorescent Colours Plastisol Inks can be screen printed directly onto dark fabrics or garments without using a white underbase! 550 Series Inks have excellent washability and a very soft hand feel when screen printed. These inks are extremely opaque and are designed for screen printing on dark fabric.