valokuvakalvon

Valokuvakalvo, often referred to as photographic film, is a transparent strip coated with a light-sensitive emulsion. This emulsion typically contains silver halide crystals suspended in gelatin. When light strikes the film, it causes a chemical change in the silver halide crystals, forming a latent image that is not yet visible. The process of developing the film then transforms this latent image into a visible image through a series of chemical baths.

There are two main types of photographic film: black and white and color. Black and white film records tonal variations in light, while color film also captures color information through different layers sensitive to specific wavelengths of light. Film is available in various formats, such as 35mm, medium format, and large format, differing in their physical dimensions and the resulting image quality and detail.

Historically, valokuvakalvo was the primary medium for capturing photographs. However, with the advent and widespread adoption of digital photography, the use of film has significantly declined, becoming more of a niche product favored by enthusiasts and artists for its unique aesthetic qualities and the tactile process of photography. Despite the shift to digital, film photography continues to hold a distinct place in the history and practice of image-making.