The French inventor, physicist and painter Louis Daguerre (1787-1851) unveiled at 1839 a device that allowed register images through a chemical procedure. East apparatus was known as daguerreotype .
The term is used to name both the machine as to the image obtained with it . It is also used as a synonym for daguerreotype , which is the name given to the technique in question.
Daguerre The work started by another French scientist continued: Joseph Nicéphore Niépce (1765-1833). To get one Photography , the daguerreotype used a copper plated plate that was exposed to iodine vapor to make it photosensitive. Then with mercury vapors , amalgams of silver and mercury were generated that gave rise to the revealed image.
In addition to all of the above, we have to make it known that at the time that Daguerre publicly made known the daguerreotype was in August 1839. He did so at the Academy of Sciences of France with great repercussion.
Also, we must know that, with the passage of time and with the support of his brother-in-law, this illustrious character managed to get a camera of his own invention for sale that responded to the name of Daguerreotype, which had the peculiarity of carrying his signature .
Thanks to that camera and the step achieved by the aforementioned Gallic, he advanced by leaps and bounds in the world of photography. Thus, among other things, the first magazine on photography that was created was in 1850 and was entitled "The Daguerreian Journal."
In the same way, it is interesting to know that, thanks to the daguerreotype and the aforementioned camera, in 1842 the photographer Carl F. Stelzner managed to obtain the first photograph of an event. Specifically, it was the image of a fire that overwhelmed a neighborhood in the city of Hamburg.
Of course, we must not forget that the daguerreotype was used within the scientific field. A good example of this is that the Soleil optician created, in 1839, a microscope-daguerreotype.
The daguerreotype is considered the first successful process of the history To take pictures However, the exposure time to capture the image, the inability to obtain copies, the fragility of the photo and the pollution generated by mercury vapor were some of the disadvantages of the device.
At that time there were other photographic procedures besides the daguerreotype. Among them appeared the calotype , created by the British William Fox Talbot . In this case, a paper treated with gallic acid and silver nitrate was used: images which captured were fixed by sodium hyposulphite.
The advantages of the calotype versus the daguerreotype were that it required a shorter exposure time, was less heavy and the products used to reveal and fix it were not so toxic.
The advancement of techniques such as daguerreotype and calotype allowed, over the years, the development of modern photography , which took a new technological leap from the creation of photography digital .
