How instant photos work
The instant camera has always been an object of fascination, since it is able to generate a developed image just in a few seconds. Besides the camera, it also consists of a portable, built-in mini-darkroom in one compartment. However, its magic lies within the photographic film itself. Instant cameras use a special self-developing film, in which the chemicals that develop the film are already present.
Once the instant film is inserted into the back of the camera and the button is pressed, light travels through the lens and lands on the surface of the film. The film passes between two stainless steel rollers. These rollers do not only move the film, but also pinch the chemical packets on the bottom of the film and break them open. Thus, the developer chemicals are moved from the edges of the photo to the middle. Then these chemicals spread over the surface of the image. Colourful pictures necessitate a film, which consists of three colour layers. The first layer recognises red information, the second one is for the yellow and the last one is for the blue pieces of information. Finally, after the chemicals are smoothed over evenly, the picture is ejected from the camera. After the photo was taken, it may take from 20 seconds to 24 hours to develop.
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