Photography 06
Photography 06 : History and Evolution: (2) First Camera Photography (1820s): After reading about Daguerre's invention, Talbot refined his process so that portraits were made readily available to the masses. By 1840, Talbot had invented the calotype process, which creates negative images. Talbot's famous 1835 print of the Oriel window in Lacock Abbey is the oldest known negative in existence. John Herschel made many contributions to the new methods. He invented the cyanotype process, now familiar as the "blueprint". He was the first to use the terms "photography", "negative" and "positive". He discovered sodium thiosulphate solution to be a solvent of silver halides in 1819, and informed Talbot and Daguerre of his discovery in 1839 that it could be used to "fix" pictures and make them permanent. He made the first glass negative in late 1839. Mid-19th-century "Brady stand" photo model's armrest table, meant to keep portrait models still during long exposure times (studio equipment nicknamed after the famed US photographer, Mathew Brady). In March 1851, Frederick Scott Archer published his findings in "The Chemist" on the wet plate collodion process. This became the most widely used process between 1852 and the late 1860s when the dry plate was introduced. There are three subsets to the collodion process; the Ambrotype (positive image on glass), the Ferrotype or Tintype (positive image on metal) and the negative which was printed on albumen or salt paper. Many advances in photographic glass plates and printing were made in through the 19th century. In 1884, the brilliant George Eastman developed the technology of film to replace photographic plates, leading to the technology used by film cameras today. In 1908 Gabriel Lippmann won the Nobel Laureate in Physics for his method of reproducing colors photographically based on the phenomenon of interference, also known as the Lippmann plate
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