The first development time (chosen to produce the lowest possible minimum density consistent with a reasonable maximum density) ranges from about 35 seconds for RC papers to about 5 minutes for some high- speed films.
Increasing the development time of a film to increase its effective speed (raising the ISO number for initial exposure ) for low-light situations; forced development.
A Glossary of Photographic Terms Menu - O - P ...
These four factors are the type of developer used, development time, temperature of the developer, and agitation as follows: Type of developer. One type of developer cannot cover all film exposure/processing situations.
To those who say about traditional B&W films "X is too flat, Y is too contrasty": manufacturer's development times and exposure indexes are just starting points.
Because of color shifts, color film usually does not lend itself to variations in development time.
Actually about 60-80% of development time for most developers is re-factoring and error fixing. Errors are a part of our life as developers.
When the predetermined development time has been reached the film is moved from the developer to a 'stop bath' which neutralises the developer and prevents any further development of the image from taking place.
Push processing involves rating the film at faster than recommended and then increasing development time because less light has exposed the film. This will increase the contrast in the final image.
Push Processing Increasing the development time of a film to increase its effective speed (raising the ISO number for initial exposure ) for low-light situations; forced development.
A Glossary of Photographic Terms Menu ...
Fiber paper tends to have more development latitude than RC, so the development time can be extended to 5 minutes. Beyond that, there's not a lot to gain.
changing the development times, temperature, chemical dilution or using different developer chemicals provides the photographer a choice of a range of speeds for any given film.
PUSH PROCESSING - Increasing development time of a film to force an increase in its effective speed, generally done to normalize results when the film has been underexposed. Also known as "Forced development." ...
-Holding back - 1. Shortening the development time given to film to help reduce image contrast. 2. Method of decreasing exposure given to selective areas of the print. Also referred to as dodging.
Pushed (Pushing)
Increasing the development time of a film to increase its effective speed, e.g. 200 ISO instead of its recommended 100 ISO.
(See Uprating & ISO)
...
Under development
A reduction in the degree of development. It is usually caused by shortened development time or a decrease in the temperature of the solution. It results in a loss of density and a reduction in image contrast.
Indeed the majority of changes are an improvement over the *ist D (which is to be expected given the additional development time but still a little annoying for *ist D owners). The *ist DS also has a larger 2.
Using Polaroid Type 809 Professional film, I begin by exposing the image accurately, then pull the backing from the emulsion after 30 seconds of development time, ...
Push-Processing Refers to increasing the development time of film. Film is designed to be exposed at its rated ISO number, but if you choose to underexpose the film, push-processing will be required to achieve acceptable results.
the things that makes an Ansel Adams print so stunning was his ability to hold details in both the brightest and darkest parts of a scene. To do this with film he developed the Zone System that guided him in adjusting exposure and development times ...
When developing that film you increase the development time (by 33% in this case) mid consequently increase the contrast.
When the pyro working solution is mixed together, it will immediately proceed through color changes from gray-green to pale amber. If there is no color change, something is wrong! At the end of the development time save the developer.
of too little exposure in the camera or when making enlargements. It reduces density and contrast.
Uprating: Rating a film at a higher speed index than normal. It causes underexposure, and is usually compensated for by increasing development time.
 See also: Development, Time, Image, Light, Film
|
