Dark Slide

Once in the camera with a light tight back and light tight bellows, the dark slide may be pulled out for the exposure to be made from a lens. After the exposure, the dark slide is put back in place and the array is put away, usually in a light tight cloth bag or box until it can be taken into a darkroom for development. The term "dark slide" refers to the fact the slide is pulled or slid out of the frame either plastic or wooden. On sliding it back in, the same channels for holding the dark slide are used to cover the film. Ordinarily, in modern film holders, the opening to permit the dark slide to be removed is protected by a strip of black velour or other black baffling that permits the dark slide to move in and out of the holder while restraining the amount of light used by the dark slide while either in place or removed.