Semi-Transparent Vinyl, Stickercal Sheets & BAMF Stickercals use a white ink base layer under the design to allow you to apply the product to any color base, white to black. Keep in mind, putting a black decal overtop of a black base will not work. The white ink layer preserves opacity of the design. The clear white outline may show may show on non-glitter or dark colored bases, not always but there is a possibility. If it does show it will be faint and not extremely noticeable.