In 1839, daguerreotype the first commercially successful photographic process was presented in Paris. Over time, photography has constantly evolved, not just regarding its technological aspects. The correct identification of the photographs is very important for conservation and restoration treatments, but also for archiving/cataloguing and dating of objects. If there are any uncertainties, a qualified photographic conservator should be consulted. By preserving these cultural artefacts one encounters a large variety of materials. In the following, the most important photographic processes are presented first.
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