Table of Contents
What is a film reticulation?
In the world of emulsions and film, reticulation is simply the science of distorting the emulsion layer to create an overall pattern in the film. The single most important ingredient to produce reticulation is extreme changes in temperatures of developing solutions.
What is reticulation in photography?
RETICULATION DESCRIBED Reticulation is a series of ridges and valleys in the surface of a photographic emulsion caused by the swelling and subsequent contraction of the gelatin of the emulsion during processing. The effect and its causes are treated briefly in some texts on photography (e.g. Mees and James, 1966).
Which occurrence causes reticulation of film emulsion?
Reticulation or cracking of the emulsion occurs from a sudden change in temperature between the developer and water bath.
For which reason would a processed film be clear?
The fixing agent removes all the silver halide crystals and therefore if a film is first placed into the fixer solution, the processed film will appear clear.
What refers to a series of steps that produce a visible permanent image on a dental radiograph?
Film processing. Refers to a series of steps that produce a visible permanent image on a dental radiograph. Reduction. During processing, a chemical reaction occurs and the halide portion of the exposed, energized silver halide crystal is removed.
What occurs when there is a sudden change in temperature between the developer and water during film development?
If there is an abrupt change from high to low temperature between the developer, stop bath, or fixer stages, reticulation can occur.
Which of the following time and temperature errors will result in reticulation of the film emulsion?
final review
| Question | Answer |
|---|---|
| Which of the following time and temperature errors will result in reticulation of the film emulsion | sudden temperature change between developer and water bath |
| developer cut off will result in a ____ border | straight white |
What is latent image in radiography?
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.
What is reticulation in dental radiography?
(rĕ-tik’yū-lā’shŭn) The presence or formation of a reticulum or network, such as that observed in red blood cells during active regeneration of blood. Also used to describe a chest radiographic pattern.
What mean by latent image?
Definition of latent image : an invisible image produced by an effect of light on matter (as silver halide or halides) which can be rendered visible by the subsequent process of photographic development.
How does the radiographic image appear if the film is overexposed?
Overexposed images will have a distinct lack of quantum mottle while appearing ‘saturated’ or in extreme cases ‘burnt out’ whereby anatomy is completely obliterated from the radiograph.
What is film density in radiography?
Radiographic density (AKA optical, photographic, or film density) is a measure of the degree of film darkening. Technically it should be called “transmitted density” when associated with transparent-base film since it is a measure of the light transmitted through the film.
What happens when film is exposed to light?
When the film is exposed to light, the silver bromide is converted to elemental silver. The fine particles of elemental silver formed appear as dark areas. This image is then chemically amplified to produce a negative when the film is developed.
What is film density definition?