https://padlet.com/10578637/tjjgu6l7ewq2 en-us 2017-12-14 10:44:57 UTC 2017-12-14 11:38:12 UTC hello@padlet.com 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216104439 Henry Fox Talbot introduces his patented calotype (or "talbotype") paper negative process, an improved version of his earlier process that greatly reduces the required exposure time.

]]> 2017-12-14 11:15:03 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216104439 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216104749 Francis Ronalds invents the first successful camera for continuous recording of the variations in meteorological and geomagnetic parameters over time.]]> 2017-12-14 11:16:29 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216104749 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216105126 Edmond Becquerel makes the first full-color photographs, but they are only laboratory curiosities: an exposure lasting hours or days is required and the colors are so light-sensitive that they sometimes fade right before the viewer's eyes while being examined.]]> 2017-12-14 11:18:21 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216105126 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216105842 Introduction of the collodion process by Frederick Scott Archer, used for making glass negatives, ambrotypes and tintypes.

]]> 2017-12-14 11:21:27 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216105842 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216106286 James Clerk Maxwell presents a projected additive color image of a multicolored ribbon, the first demonstration of color photography by the three-color method he suggested in 1855. It uses three separate black-and-white photographs taken and projected through red, green and blue color filters. The projected image is temporary but the set of three "color separations" is the first durable color photograph

]]> 2017-12-14 11:23:35 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216106286 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216106742 Louis Ducos du Hauron patents his numerous ideas for color photography based on the three-color principle, including procedures for making subtractive color prints on paper. They are published the following year. Their implementation is not technologically practical at that time, but they anticipate most of the color processes that are later introduced.

]]> 2017-12-14 11:26:01 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216106742 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216107878 Hermann Wilhelm Vogel discovers dye sensitization, allowing the blue-sensitive but otherwise color-blind photographic emulsions then in use to be made sensitive to green, yellow and red light. Technical problems delay the first use of dye sensitization in a commercial product until the mid-1880s; fully panchromatic emulsions are not in common use until the mid-20th century.

]]> 2017-12-14 11:31:19 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216107878 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216108279 Hurter & Driffield begin systematic evaluation of sensitivity characteristics of photographic emulsions — the science of sensitometry.

]]> 2017-12-14 11:33:07 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216108279 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216108806 Heat ripening of gelatin emulsions is discovered. This greatly increases sensitivity and makes possible very short "snapshot" exposures.

]]> 2017-12-14 11:35:27 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216108806 10578637 https://padlet.com/10578637/tjjgu6l7ewq2/wish/216109346 The Kodak n°1 box camera, the first easy-to-use camera, is introduced with the slogan, "You press the button, we do the rest.

]]> 2017-12-14 11:37:37 UTC https://padlet.com/10578637/tjjgu6l7ewq2/wish/216109346