copper plate coated with silver iodide
Daguerreotype
Nicephore Niepce is credited with inventing the photographic process, but not until 1825 after a few years of trying. The 18th century as you asked, is too early.
Louis Daguerre introduced daguerreotypes in 1839.
They were opticians and instrument makers (Charles the son, Vincent the father) who made lenses for the camera obscura (not to be confused with the early photographic cameras). Nicéphore Niépce, and Daguerre collaborated with the Chevalier's to create lenses for their prototype cameras. After a time, Charles formed his own company and created the first folding camera.
The first commercially-produced Daguerreotype camera (Daguerre-Giroux, 1839) was equipped with a simple shutter in the form of a sliding plate that could be slid open to make exposures. Exposure in other early cameras was controlled simply by removing the lens cap, which served as a kind of simple shutter. Mechanical shutters called "drop" or "Guillotine" shutters were invented for making instantaneous exposures in the early 1850's.
Daguerreotype
The Frenchman Louis Daguerre invented the daguerreotype, an early photographic process that used a iodine-sensitized silvered plate and mercury vapor to produce photographs. Daguerre made this discovery by accident in 1835, and this photographic process was introduced to the public in 1839.
A daguerreotype is a photograph made by an early photographic process. The photo was produced on a silver plate sensitized to iodine and developed in mercury vapor.
It was an early form of photograph.
N.-P Lerebours has written: 'A treatise on photography' -- subject(s): Early works to 1850, Photography, Daguerreotype 'A treatise on photography' -- subject(s): Daguerreotype, Early works to 1850, Photography
Nicephore Niepce is credited with inventing the photographic process, but not until 1825 after a few years of trying. The 18th century as you asked, is too early.
Louis Daguerre introduced daguerreotypes in 1839.
Early Classics was created in 2001.
Early Dawg was created in 1964.
Early Daze was created in 1993.
Early Song was created in 1999.
The Early November was created in 1999.