It can be achieved by chemical or light means. Latent image is the invisible image produced by exposure which can be made visible by development. Lateral reversal is a mirror image reversal of the subject from left to right, as found in the viewfinders of some reflex cameras. Latitude is the degree by which exposure can be varied and still produce an acceptable image. The degree of latitude varies by film type.
Faster films tend to have greater latitude than slower films.
LCD stands for liquid crystal diode. LCD is an electronic solid state display system commonly used for the face of wrist watches, and also used to display exposure information in the viewfinder of most modern day cameras. A surface can be temporarily changed from transparent to dense black by application of a charge. The LCD can be programmed to display any required black shape. Lead acetate is a crystalline, highly poisonous powder used in some toning and intensifying solutions.