semitransparenten

Semitransparenten is a term used in German to describe materials and surfaces that allow only part of the incident light to pass through. They are between fully transparent and fully opaque, so objects on the other side are visible but not in full detail. The degree of translucence depends on thickness, composition, surface finish, and wavelength of light. In physics and materials science the property is often described by transmittance, which ranges from 0 to 1 (or 0% to 100%).

In practical terms, semitransparent materials include frosted or tinted glass, translucent plastics, parchment or tracing paper, and sheer textiles. These materials diffuse light, reduce glare, and provide privacy while still admitting daylight. The visual effect is influenced by color tint, scattering, and the surface texture; thicker layers or stronger pigments generally increase opacity.

In digital graphics and user interfaces, semitransparency is implemented via an alpha channel or opacity setting. A pixel with partial transparency lets the background show through, producing layering and compositing effects. Typical values range from 0 (fully transparent) to 1 (fully opaque). This concept is central to image editing, web design (where overlay colors and translucent widgets are common), and visual media.

Terminology varies by context. Semitransparent can also be described as halbtransparent or durchsichtig with partial opacity, while semitransparenz denotes the property itself. The term encompasses both physical materials and digital representations, highlighting a partial rather than absolute passage of light or visibility.