1. Can you find Image evidence of the technique?
2. When was it first discovered and by whom?
It was first discovered by Louis Daguerre together with Joseph Nicephore Niepce in the 19th century.
3. What is special about the technique?
The technique is famous for the extremely long shutter exposure which would roughly take around 10 minutes to process the image then the process to make the actual image would take even longer due to the immense amount of chemicals and labour.
4. How does this technique work? Can you find or describe the processes needed to make it work? Maybe illustrate how it is made.
The most simple process is Silver+iodine+light=Photgraph but it takes a more time and labour for a beginner.
Step 1. Start with a silver plated piece of copper and polish it to a close as mirror finish as possible.
Step 2. You need to sensitize the plate. Place the plate into a box containing a shallow tube filled with iodine crystals. After a few minutes take the plate out and it should be a purplish blue.
Step 3. Put the sensitized plate into your cameras film holder.
Step 4. Use a well lit room and choose and object that is very stationary because of the long shutter time that would normally take around 1 minute to 7 minutes.
Step 5. In a Darkroom, remove your exposes plate and tap a sheet of AmberLith film on top. Seal the edges with light proof tape and place it in the sun for two hours.
Step 6. Now it’s time to wash your plate. Mix up a hypo clearing agent in a developing tray, place the plate into a solution-filled tray.
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5. Can you comment how important this technique has been for the history of photography? For example was it popular and is it still used today?
This technique has been a major influence over photography making it possible to take pictures and making them last for so much longer than previous attempts to make a photo stay on the material than just fading away.
Friday, 28 January 2011
Colour Photography
1. Can you find Image evidence of the technique?
2. When was it first discovered and by whom?
The first colour photograph was produced by a Scottish physicist that used a three colour method in 1861.
3. What is special about the technique?
This method is famous because you had to take a normal black and white photo then you has to pass the black and white through three colour filters that would make the colour photo in three primary colours.
4. How does this technique work? Can you find or describe the processes needed to make it work? Maybe illustrate how it is made.
You take your black and white picture and pass it through three colour filters that will make the colour image that will have three primary colours in it.
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5. Can you comment how important this technique has been for the history of photography? For example was it popular and is it still used today?
This technique was the first to produce a colour picture but because the process is so time consuming that it could not be put into practical use and is not used in today’s colour picture production.
2. When was it first discovered and by whom?
The first colour photograph was produced by a Scottish physicist that used a three colour method in 1861.
3. What is special about the technique?
This method is famous because you had to take a normal black and white photo then you has to pass the black and white through three colour filters that would make the colour photo in three primary colours.
4. How does this technique work? Can you find or describe the processes needed to make it work? Maybe illustrate how it is made.
You take your black and white picture and pass it through three colour filters that will make the colour image that will have three primary colours in it.
.
5. Can you comment how important this technique has been for the history of photography? For example was it popular and is it still used today?
This technique was the first to produce a colour picture but because the process is so time consuming that it could not be put into practical use and is not used in today’s colour picture production.
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