How do we develop a latent image into a permanent photograph?

How do we develop a latent image into a permanent photograph?

photographic processing, set of procedures by which the latent, or invisible, image produced when a photographic film is exposed to light is made into a permanent visible image. An emulsion holding grains of photosensitive chemical compounds called silver halides is spread over a film or other material.

Is the process of making the latent image visible and permanent?

Photographic processing transforms the latent image into a visible image, makes this permanent and renders it insensitive to light. All processes based upon the gelatin-silver process are similar, regardless of the film or paper’s manufacturer.

How does a latent image become a visible image?

The invisible latent image is converted into a visible image by the chemical process of development. The developer solution supplies electrons that migrate into the sensitized grains and convert the other silver ions into black metallic silver. This causes the grains to become visible black specks in the emulsion.

What is latent image in dental radiography?

Latent Image. The pattern of stored energy on the exposed film cant be seen. The latent image remains invisible within the film emulsion until it undergoes chemical processing procedures.

What is the difference between a latent image and a visible image?

Unsourced material may be challenged and removed. A latent image is an invisible image produced by the exposure to light of a photosensitive material such as photographic film. On the other hand, the formation of a visible image by the action of photographic developer is called developing out the image.

Does latent image solve security problems?

Currently, latent images are used mainly to protect particularly valuable printing products, such as banknotes, securities, control documents. Since these images refer to human readable features, their control is not automated.

Where is the latent image found?

The latent image is the invisible product of x-ray or photographic film emulsions, build after radiation or light exposure. The visible image is developed and fixed chemically from the latent image. Latent images are also produced in a photostimulable storage phosphor and retrieved by scanning with a laser.

How do you form a latent image?

A latent image is an invisible image produced by the exposure to light of a photosensitive material such as photographic film. When photographic film is developed, the area that was exposed darkens and forms a visible image.

Which is a disadvantage of automatic processing?

Disadvantages: Higher capital cost – Automatic lines are a much bigger investment than manual lines, and are a much less affordable option. More maintenance required – Automatic lines include much more machinery than manual lines, and thus require much more time and money dedicated to maintenance and repairs.

What is an example of automatic processing?

Any information processing that occurs involuntarily and without conscious intention or control, as in the performance of well-practised activities such as seeing, reading, riding a bicycle, playing a game, or driving a car.

Which is an example of a latent image?

Latent image. An image formed by the changes to the silver halide grains in photographic emulsion on exposure to light. The image is not visible until chemical development takes place. The invisible image left by the action of light on photographic film or paper.

How does film processing change latent images into manifest images?

Film processing changes the latent image into a manifest image. The term manifest image refers to the image that exists on film after exposure and processing. The manifest image typically is called the radiographic image.

Why is a defect free crystal a latent image?

A pure, defect-free crystal exhibits poor photographic sensitivity, since it lacks a shallow electron trap that facilitates the formation of a latent image. In such a case, many of the photoelectrons will recombine with the silver halide crystal and be wasted.

How are sensitivity specks used to develop latent image centers?

Sensitivity specks serve as the focal point for the development of latent image centers. After exposure, these specks trap the free electrons and then attract and neutralize the positive silver ions. After enough silver is neutralized, the specks become a latent image center and are converted to black metallic silver after chemical processing.