chemistry of photography

A detailed Summary of chemistry of photography

When someone says the word photography the first thing that most

people think of is pictures. People never think of what goes in to the

developing process. They do not think about all the chemicals that go into

developing the pictures. Many people just wonder why their picture came back

with nothing on it or why they look like a ghost. They do not even bother to

think about all the chemistry that goes on to develop the pictures. They think of

how much money they just wasted on a bunch of messed up pictures. If they

were to sit down and think about all the chemicals that went into making that

one picture they would view it differently. Photography is just another form of

In the year 1864 a chemist by the name of Joseph Wilson Swan

produces the first way to develop film. (Joseph). What was known as the auto

type process was created by using a gelatin film soaked in carbon or other

pigment granules. This process would then be photosensitized by using

potassium dichromate. Later in 1879, he produced the bromide printing paper

that we now use in standard photographic medium.

Since photography has been around for about 100 years the chemicals

used to make both motion pictures and

"AWP Research". AWP.Online.Internet.4/26/01

(Photographic) If used correctly the fixer is to dissolve the undeveloped silver

a developer with a strong accelerator you will get a quicker developing time and

"Joseph Wilson Swan". Hutchinson's Biography Database.

"AWP Research". AWP.Online.Internet.4/26/01

washing aids , the wetting agents , and all of the toners that are used to develop

the image. (Davis) Some fixers that are commonly used are Boric acid,

bath. (Davis) The most common stop bath is made of 28% acetic acid, which is

proper way. You should never flush or pour chemicals down the sink or toilet.

working in your dark room you also want to have and air change at least ten

a container to use you want it to also be heated other wise the emulsion will

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Category: Miscellaneous

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