one of my collection of Daguerreotype,s ...louis Daguerre,
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one of my collection of Daguerreotype,s ...louis Daguerre,
very nice Jacky, what are they? what were they used for?
L’Atelier de l'artiste. An 1837 daguerreotype by Daguerre.
The solar eclipse of July 28, 1851 was the first correctly exposed photograph of a solar eclipse, using the daguerreotype process.
A daguerreotype (original French: daguerréotype) is one of the earliest photographic processes, developed by Louis Daguerre, in which the image is formed by amalgam i.e. a combination of mercury and silver. Mercury vapor from a pool of heated mercury is used to develop the plate that consists of a copper plate with a thin coating of silver rolled in contact that has previously been sensitised in iodine vapor (later sensitivity was increased by using the other halides - chlorine and bromine to form silver chloride and silver bromide crystals reducing the exposure time to about one minute.
A thin image on the silver mirrored surface, the actual image is delicate and will be damaged if it is rubbed with the fingers. Daguerreotypes had to be mounted in airtight cases with a glass cover to prevent oxidation from the air and finger marks.
When viewing the daguerreotype, a dark surface is reflected into the mirrored silver surface, and the reproduction of detail in sharp photographs is very good, partly because of the perfectly flat surface.
L’Atelier de l'artiste. A daguerreotype by Daguerre.
Thats a realy good piece of information is that Jacky and you said your school only produced doctors, lawyers and dentists, what about scientists?Quote:
Originally Posted by jacky gunnion
My first job was working in a photographers, well photo finishers realy. We used to develop peoples photos from the chemists' shops. I was in the darkroom all day processing film. never saw daylight for weeks on end during the winter.
The boss owned a few firms, one being a firm called 'Panagraphs' who used to take school photos, the type you see in a long glass frame about three foot long. The photographer used to get the whole school to sit in an arc formation, he would have a camera with a long length of film inside. It would be set up in the centre of the group. The photo was all taken by a clockwork motor, which started at the lefthand side of the group and the camera would turn by the clockwork mechanism and end up finishing at the opposite end of the group. When the film was developed it would be used as a contact print to produce the final picture.