Invisible ink for inkjet printers that use "micro Piezo" printhead please ask us about compatibility before you purchase this item. The 4-color set contains the invisible white ink (for Black), Magenta, Cyan and Yellow. This ink is for printers is specially designed for perfect compatibility with inkjet printers for printing pictures, text, images, invisible to the naked eye. An ultraviolet light can make the picture, image or text printed with this ink look as though it were a miracle. This invisible ink has properties that allow it to withstand exposure to sunlight (not losing intensity), water and heat (will not evaporate). UV ink is invisible to normal light and becomes visible to UV light in any color shade, including black in color from the primary color blend of the printer.