The A5 cards “BLACK ON” and “WHITE ON” rely on the contrast between the material and the design. “BLACK ON” was printed on BLACK & WHITE, while “WHITE ON” was printed on BLACK—the darkest black on the market. The black areas feature lacquer lettering that appears black on black and is only visible when held up to the light, while the white print makes the white motifs stand out clearly against the black background. The color contrast between the motif and the material is particularly striking—and at second glance, the lacquer lettering on black appears especially high-quality.