ANGELO SALA (BEFORE 1700: LIGHT SENSITIVE MATERIALS)

Angelo Sala ( Before 1700: Light Sensitive Materials )
   The thought that light can influence different substances for example , the suntanning of skin or blurring of material more likely than not been around since early occasions. 
   Thoughts of fixing the pictures found in mirrors or alternate methods of making pictures consequently may likewise have been in individuals' psyches well before anything like photography was created. 
   Be that as it may, there appear to be no authentic records of any thoughts even distantly taking after photography before 1700 , in spite of early information on light-touchy materials and the camera obscura. 
   In 1614 Angelo Sala noticed that daylight will turn powdered silver nitrate dark , and that paper folded over silver nitrate for a year will become dark. 
   We should now speak somewhat around one of Angelo Sala's fundamental spaces of study , and furthermore about Angelo Sala's commitments to the improvement of photography. 
   One of his principle spaces of study concerned compound character and the part of iotas in synthetic change. 
   His analyses with silver nitrate and silver salts were a significant advance in creating the photographic interaction. 
   In 1614 , he exhibited that "powdered silver nitrate is obscured by the sun", just as the paper that was enveloped by it. 
   This disclosure of the sun and its impact on powdered silver nitrate was not upheld and along these lines excused by "regarded" researchers , saying their revelation "had no viable application". 
   Oddly , there is a down to earth application to finding it , the noticeable utilization of silver nitrate in the act of speculative chemistry. 
   Solely after Sala's revelation was joined with the optical works of numerous different physicists , be that as it may , was photography at last developed during the 1830s. 
   His work was a significant advance towards a superior comprehension of synthetic responses and the acknowledgment that a few substances are made out of compound mixes of different substances , which is crucial for the marvel, which creates , loves and makes the photo.

ANGELO SALA

START OF THE CAMERA HISTORY

 Start of Camera History 
A characteristic marvel , known as a camera obscura or pinhole picture , can project a picture (altered) through a little opening on a contrary surface. 
This standard may have been known and utilized in ancient occasions. 
The soonest known set up account of the camera obscura can be found in Mozi's Chinese compositions , tracing all the way back to the fourth century BC. 
Until the sixteenth century, the camera obscura was for the most part used to examine optics and cosmology, particularly to watch sunlight based obscurations securely without making harm the eyes. 
In the second 50% of the sixteenth century , some specialized upgrades were created , a biconvex focal point at the gap (first portrayed by Gerolamo Cardano in 1550) and a stomach confining the opening (Daniel Barbaro in 1568) gave a more clear and more keen picture. 
In 1558, Giambattista della Porta educated the utilization regarding the camera obscura as an attracting help his famous and powerful books. 
Della Porta's recommendation was broadly received by craftsmen and , since the seventeenth century , convenient renditions of the camera obscura were usually utilized - first as a tent , then, at that point as boxes. 
The container type camera obscura was the reason for the main photographic cameras when photography was created in the mid nineteenth century.

Principle of a box camera obscura with mirror

THE MOUSETRAP CAMERA

 THE MOUSETRAP CAMERA

   The so-called Mousetrap camera , used by William Henry Fox Talbot in his early experiments in creating the negative process in the 1830 , is the center-piece of an exhibition entitled Kingdom of Elegance , Mahogany and Brass which shows off early cameras from the UK's photographic industry.

Who Was William Henry Fox Talbot?

 Who Was William Henry Fox Talbot?

He was an English writer and Scientist, Pioneer of Photography.

   He was educated at Trinity College (Cambridge).

   He used the dark camera for drawings on his travels.

   Talbot was a much more discreet and collected man than Daguerre.

   He had been researching the fixation of the dark camera image for some time.

   Extremely erudite, with multiple investigative interests, his knowledge extended from mathematics, an area in which he was an expert, to oriental languages, passing through Physics and Chemistry.

   Shortly after the French Government announced Daguerre's invention, Talbot claimed the priority of his invention in a report to the Royal Society, called "Some reports on the art of Photogenic Design", the process by which natural objects can be achieved reproduce by themselves ”.

   Unlike Daguerre, the publication of this report was private and very limited, restricted to fellow scientists at the Academy.

   Talbot began his photographic research, trying to obtain contact copies of silhouettes of leaves, feathers, lace and other objects.

   The paper was dipped in nitrate and silver chloride and after drying, made its contact with the objects, obtaining a dark silhouette.

   Finally, the paper was fixed flawlessly with ammonia or a concentrated salt solution.

   Sometimes, potassium iodide was also used.

   South gallery window of Locock Abbey Abbey.

   In the year 1835, Talbot built a small wooden camera, only 6.30 cm², which his wife called "mousetrap".

   The camera was loaded with silver chloride paper, and according to the lens used, it was necessary between half and one hour of exposure.

   The negative image was fixed in table salt and subjected to contact with another sensitive paper.

   Thus, the copy was positive if the lateral inversion.

   The best known shows the window of the Locock Abbey Abbey Library, considered the first photograph obtained by the negative / positive process.

The Calotype

 The Calotype

   It is a process of fixed, discovered by Talbot, which caused non-exposed particles of silver iodide to be insensitive to light, thus avoiding the total blackening of the plate. 

   He called it Calotype, required exhibitions of about 30 seconds to get an adequate image in the negative.

   Talbot will take an important step in the story by publishing in 1844 the first printed book with photographs. 

   "The Pencil of Nature", who tries to make known the calowpe and photography in society, also explaining how he has made the photographs.

   With the Calotype, two characteristics of the current photograph are born: its low economic cost and the possibility of taking copies. 

   The calowpe uses a paper with a layer of silver nitrate and gallic acid that is revealed with sodium hyposulphite.

   In this picture is possible to watch the First Negative, direct , not by contact, view of the window of your house. 

   Discovery made by Fox Talbot, 1835.

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Photography Camera Version Louis Jacques Mandé Daguerre (The Daguerretype) (1839)

 The Photography Camera Version Louis Jacques Mandé Daguerre (The Daguerretype) was presented to the public in Januray 7 , 1839