Create: The Impact of Lighting

How It Works

How it Works

Contra Vision® window perf transforms glass with one-way vision graphics which cannot be seen from the other side. The graphics are used for window advertising, branding or to achieve decorative effects. They also provide privacy and solar control benefits to people inside buildings and vehicles without blocking their view outside.

The Contra Vision effect is most commonly achieved by applying a self-adhesive perforated window film to the glass. The film contains areas of printed graphic (a print pattern) as well as unprinted see-through areas covering up to 50% of the film. When looking at the side with see-through window graphics, the eye is drawn to the printed colors because they reflect more light than passes through the see-through areas (provided the lighting on the outside is brighter than the inside).

The secret behind the one-way vision effect is ensuring the printed graphics are obscured or hidden from the other side of the glass. This is best achieved by having a black “backing” which covers exactly all the printed areas on the film without blocking the see-through (unprinted) areas. When looking through the reverse side of the film, the view coming through the film is dominant because the black layer absorbs light and is less apparent to the eye.

Get the Lighting Right

Lighting is a determining factor to the overall impact of see-through window graphics. One-way see-through window graphics are only effective where there is more light on the outside(image side) than on the inside (black side). When there is more light on the inside or during the hours of darkness, conventional see-through graphics can suffer from ‘burn-through’ where the lights inside a building or vehicle sometimes reduce and may eliminate the impact of the graphics, if there is no or inadequate external illumination.

Backlit see-through graphics offer a solution if light levels are reversed, for example, during the hours of darkness. Contra Vision® Translucent Whitegraphics also allow daylight in and a view out, with the translucent film using existing in-store lighting to ‘back-light’ the graphics during the hours of darkness. Spot or flood lights directed at the graphics from inside the window but outside the field of vision effectively transform them into an illuminated sign.

Another option in poor lighting conditions is to illuminate the outside of the glass with artificial lighting.