We've created a video to highlight some of the possibilities of printing with white ink, such as printing directly to non-white materials, and printing an etch-effect vinyl.
White ink is primarily used when a non-white material is being used. CMYK printing requires a white surface to sit on to ensure colour consistency. Without a white surface, the CMYK print could be too dark, or too light, depending on the colour of the surface the print is on. White ink therefore allows a wider use of materials to be used in print projects, whilst ensuring colour consistency. Without white ink, white vinyl would have to be applied to the non-white surface, but this increases production time, project cost, and the thickness of the finished product. White ink can be used in a variety of ways, in addition to being printed on top of. Just white ink could be used on a dark material to create a high contrast display with great colour depth, or varying amounts of white ink could be used on a display to deliberately let some of the non-white base material to show through the CMYK print. Using a combination of white ink and CMYK can produce a frosted vinyl effect - providing a way to creatively use frosted vinyl as the density of the effect can be controlled to suit your requirements.