Kodachrome is the brand name of a film produced by Kodak from 1935 to 2009. Kodachrome film was the first commercially successful three-color film with natural color reproduction. Until the 1990s it was favored by many professional photographers due to its high sharpness and fine grain as well as its vivid colors compared to other color films. Kodachrome film is extremely long-living in archives and there is a huge stock of developed but undigitized material.
A big difference to other color film is the composition of the film emulsion, which, like black-and-white film emulsion, contains silver halides. Silver reflects infrared light. This fact does not allow any automatic, infrared-based dust and scratch removal for Kodachrome film scans. The SRDx Photoshop Plug-in provides a great way to effectively remove defects such as dust and scratches from Kodachrome film.