How does a Polaroid 600 camera work?
The working of the Polaroid camera does not differ from those film-based cameras. It is however beneficial to note earlier some advantages of the Polaroid camera to digital and some others. One of them is the ability to produce instant cameras. The working is by capturing images and storing them on a film in the form of light patterns. The film is made of a photosensitive material deposited at the back of a plastic base, which is covered by silver.
The user observes the image through a lens when they are about to take the picture with the camera. When it is ready, the camera shutter will open to enable taking the image. This image is deposited on the photosensitive material. It is also possible to use the regular film used with other cameras in taking the pictures using the Polaroid Camera, but this will require that one visits the studio to develop in order to recover the images. This is different from using the Polaroid instant film, which comes mounted on the camera or bought for mounting the camera once the previous one is filled with images. This one enables the production of instant cameras without visiting the studio. In fact, this is the major difference between other types of cameras and the Polaroid types.
The basics for photographic films are needed in order to understand how a Polaroid 600 film can be developed to recover the pictures. Films come in two types, namely the Monochrome and the colored type, but all are made of a light sensitive material deposited onto a silver covering on plastic base as described earlier on. For the colored types, three silver compound layers exist while only one exists in the monochrome type. The three layers in the colored type are sensitive to red, green and blue, as primary colors. The bottom is set to react when exposed to red, the top when exposed to blue light, while the middle layer will react when exposed to the green light. Of course, light is a mixture of all colors. This record of the pattern is stored in the film chemically. Then, there is need for development in order to recover the picture.
Development involves conversion of the exposed silver material into metallic silver by use of a chemical. Then, dye couplers (with cyan, magenta and yellow dyes) are used to treat the film. A picture will result when the three dyes reacts with the layers of the silver in the film.
Inside the Polaroid camera instant film are the three described layers, but beneath each layer are chemicals to develop pictures. All the layers inside the instant film are the developer, image, timing and acid layer. Along the plastic border of this instant film is a chemical reagent which is meant to set off the chemicals aforementioned. This reagent is kept away from the silver compound. The reagents are spread by the help of two rollers at the front of the camera, which press the image print when it is coming out to produce a beautiful photo.