The Wet Plate Collodion Process Video 21 October 2012
Honza Hronek photographer in Paris
A Brief History of Photography: Innovations in Chemistry - Bytesize Science 14 November 2012
A Brief History of Photography: Innovations in Chemistry - Bytesize Science Video 14 November 2012
The history of photography
is rich with chemical innovations and insights,
producing hundreds of different processes to develop images
in unique and often beautiful ways.
But these historical images can be difficult to conserve,
especially since each type of photograph
requires a different preservation technique.
While two photos could look very similar,
they may differ chemically in dramatic ways.
This is where photo conservation scientists like Art Kaplan
at the Getty Conservation Institute come into the picture.
Art spends his days studying different styles of photographs,
their materials and the chemistry that gave life to still life
in the early days of photography.
His office is loaded with drawers of photographic samples,
scientific instruments and a clear passion for frozen history.
In our latest video,
Art explains the developmental processes
of several types of photographs
ambrotypes and tintypes.
The Gelatin Silver Print: Photographic Processes 2 August 2012
The Gelatin Silver Print: Photographic Processes Video 2 August 2012
Photography has shaped the way we remember
and how we are reminded.
Photography has created an incredible cultural shift
--our communication and expression forever changed.
In a completely new way,
we could reveal what was important to us,
who we were and who we loved.
as The Beggar Maid (circa 1859),
a Albumen silver print
from a glass negative by Lewis Carroll.
The Metropolitan Museum of Art.
Met Museum Acquires Gilman Trove of Photos
New York Times, Randy Kennedy, Published: March 17, 2005
black and white film photography chemistry
The First Photograph
is a one-of-a-kind permanent positive-image process,
secured upon the surface of a pewter plate in 1826 USA
photography > digital / silver-gelatin process
Unveiling the new wetplate camera from Black Art Woodcraft.
A modern modification
of an authentic mid-19th century camera,
with a variety of plate sizes up to 8x10.
The entire process
from first contact
to a finished, delivered camera
took seven months,
but the wait
was entirely worth it.
Check it out
and see for yourself!
Invented in 1851,
the wet collodion photographic process
produced a glass negative
and a beautifully detailed print.
Preferred for the quality of the prints
and the ease with
which they could be reproduced,
the new method thrived
from the 1850s until about 1880.
making glass plate negs > wet plate (collodion) / dry plate
1890 in glorious colour:
the magic of photochromes – in pictures UK
stereo-view camera > stereograph UK
the dawn of photography USA
A new dawn:
19th-century photography awakens – in pictures UK
During their earliest period,
the first photographs were one-off,
singular, direct positive images (...).
William Henry Fox Talbot (1800-1877),
one of photography’s
was the first to realise
the importance of the negative
as part of a two-stage,
whereby multiple positives
could be made
from a single negative.
By placing a sheet of paper
coated with light-sensitive silver salts
in a camera and exposing it to light,
Talbot produced, by further development
and fixing of the latent camera image,
a negative (calotype) of his subject.
when placed in contact
with a similarly sensitized paper
and further exposed to light,
inverted the values of the negative
to produce the positive print.
wet-plate collodion process
Wet-plate was first detailed
by Frederick Scott Archer in 1851,
less than three decades
after the dawn of photography,
and was known ominously
as the "black art",
partly on account of the potential perils
- death from cyanide explosions
and blinding from silver among them.
revelatory civil war images
the faces and realities of conflict,
and Eadweard Muybridge
produced stunning images
of Yosemite National Park
by lugging mammoth
high into the mountains,
and Julia Margaret Cameron
created ethereal shots
which promoted photography
as an art form.
Production died swiftly, however,
as the insatiable desire
for photographic innovation
saw the emergence
of dry-plate technology
and collodion emulsion,
followed by handheld
cameras and film.
a salted print from a paper negative
Nicéphore Niépce 1765-1833
The first photograph 1827
Cool Science: Silver Chloride Photochemistry
collodion positive process / ambrotype
first appeared in about 1853.
By the 1860s
had largely disappeared
from high street studios,
but it remained popular
with itinerant open-air
until the 1880s,
could be made
in a few minutes
while sitters waited.
The collodion positive process,
which was based
on the collodion negative process
invented by Frederick Scott Archer,
reversed a negative image
by bleaching the silver salts.
The dark areas
which would normally form
the highlights in a printed image
and the clear areas
which would form the shadows
in the print appeared to be dark.
against a black background,
the dark areas of the original negative,
which had been bleached
with nitric acid or bichloride of mercury,
appeared as highlights.
The black backing,
the clear areas of the plate
that originally formed the highlights,
appeared as shadows.
the so-called collodion positive
was in fact a negative,
the emulsions were too thin
to make satisfactory prints on paper.
When the collodion positive
was held to the light
without the backing material,
the image still looked like a negative,
though paler than the standard required
to make a satisfactory positive print.
Cyanotype is a photographic printing process
that produces a cyan-blue print.
Engineers used the process
well into the 20th century
as a simple and low-cost process
to produce copies of drawings,
referred to as blueprints.
The process uses two chemicals:
ferric ammonium citrate
and potassium ferricyanide.
- 30 September 2020
the most famous photographer in the United States > Civil War 1861-1865
“Whatizzit Wagons,” or Whatsits
- mobile darkrooms (which)
were an early predecessor
of the news-gathering vehicle
wet plate > Sally Mann
Ed Drew's Afghanistan:
the first wet-plate conflict photos in 150 years 2013
US military gunner Ed Drew
from the early days of photography
to create striking portraits
that recall images
from the American civil war.
glass plate photography USA
Glass Plate Negatives: A Brief History
Glass plate negatives
comprise two formats:
collodion wet plate negatives
and gelatin dry plate negatives.
have a light sensitive emulsion
with a binder thinly layered
on one side of a glass plate.
Frederick Scott Archer,
a British inventor and photographer,
made the first collodion
wet plate negative
In order to prepare a negative,
a photographer coated
a clean sheet of glass
a liquid with ingredients
that included cellulose nitrate
Then the plate was quickly
put into a silver nitrate bath
in order to sensitize it to light
and placed in the camera,
where the negative was exposed.
The photographer had to develop it
very quickly after exposure.
Because it was necessary to prepare,
expose and develop a negative
while it was still wet,
this process of making photographs
was complicated, inconvenient,
and not very portable.
Richard Leach Maddox,
a British physician and photographer,
produced the first practical
dry glass plate negative in 1871.
In his much more convenient process,
the glass plate was coated with gelatin
and sensitized with silver salts.
The negative did not need
to be developed immediately
was so well-received
that dry plates replaced wet.
Within ten years
they were produced in factories
and became widely available,
especially for amateur photographers.
One no longer had to be skilled
in mixing potentially dangerous chemicals
and could store undeveloped images
for long periods of time.
Gelatin dry plate negatives
were widely used into the 1920s.
By then gelatin sliver paper negatives
and celluloid roll film
had become popular.
hand-coloured glass slide
printing glass plates
Related > Anglonautes > Vocapedia
Related > Anglonautes > Arts