Photography represents an important part of our everyday, without which we could not live in the same way. It is characterized by an almost identical reproduction of the world as by our eye. In some cases, it is even better. Today’s quality of photographs arises from a long history dating back from Aristotle over researches about the impact of light and projection of light through a small hole to the first known photograph, made in 1827. Before digital photography, there were many analogue processes, which have led to the silver-halide photography process.
In the theoretical part of the thesis, we presented the silver-halide process along with a historical review of crucial prior processes. We described materials, necessary for such a process, with emphasis on the photographic film and developer. In the final part, we described possibilities to influence the level of developing, among which are also the extension of developing time and increased temperatures of the developer. This is the so called push processing, where an increased level of developing is replaced with underexposure of the photographic film.
Presented is the developing process with time extension, which we performed with six different developers and five levels of underexposure. Stated are all the used parameters of illumination and development of individual samples.
We compared the samples and found, which developer is more suitable for the developing of the film with push processing or for the developing of the used film. The results differ in terms of contrast, grading, dynamic range and sharpness. We can say that the results are subjective, since already the very perception of the stated factors is subjective.
The results are a good cue for each individual photographer, who decides, which developer to use to develop films.
|
