Jamdin
Explorer
The process is called Autochrome:
"The Autochrome was patented on 17 December 1903 but not unveiled to the Academy of Science until 30 May 1904, which is why its centennial is celebrated in 2004.
The start of the 20th century saw thousands of photographs being taken all over the world using this transparency process, which Louis Lumière considered to be his masterpiece.
This open-air exhibition features largesize reproductions of many Autochromes, all of which are from the original Lumière Collection, with the aim of making them accessible to the general public. The photographs include a variety of family scenes and also a number of shots given to Louis Lumière by Autochrome-using friends, such as pictures of the Great War taken by Jean-Baptiste Tournassoud."
Full article and pictures are here
"The Autochrome was patented on 17 December 1903 but not unveiled to the Academy of Science until 30 May 1904, which is why its centennial is celebrated in 2004.
The start of the 20th century saw thousands of photographs being taken all over the world using this transparency process, which Louis Lumière considered to be his masterpiece.
This open-air exhibition features largesize reproductions of many Autochromes, all of which are from the original Lumière Collection, with the aim of making them accessible to the general public. The photographs include a variety of family scenes and also a number of shots given to Louis Lumière by Autochrome-using friends, such as pictures of the Great War taken by Jean-Baptiste Tournassoud."
Full article and pictures are here