[epeap ed]

hey,  I am a young art student, I studied photography and printmaking, and I want to combine this with each other.
What I want to do is to make a camera obscura for lithography.
In Lithography we draw (or paint....) with fat, so what is drawn is printable.

Now I am searching for a formula which combines photosensitive materials with some kind of fat.
But the problem is that the reaction should be so strong that all the fat should be burned away in the progress.

Is there somebody who can help me to create the formula.
I've had the basic chemistry education, but i wouldn't call myself a scientist.... so if there is anybody in here who has a better view on these kind of chemicals it would help me a lot.
thanks

 

[billnotgatez]

Is this the device?
http://en.wikipedia.org/wiki/Camera_obscura

Is this applicable?
http://en.wikipedia.org/wiki/Pinhole_camera

This would be of interest also
http://en.wikipedia.org/wiki/Lithography

[Mitch]

Different kind of science art http://blog.chemicalforums.com/

[Borek]

I don't remember details, but I am more then sure that you will find some good ideas in the old printing technology (used about 100 years ago). Check your library, look for books on history of printing. Or better yet, look for old handbooks on printing. I have seen such recipes listed (as curiosities) in books printed around 1950, but it was about 30 years ago and in Polish

[epeap ed]

It's true I thought that i would find the answer in old photography, like daguerreotype for instance, but the chemical reaction is not strong enough to burn all the fat away.
I already checked the library, but there aren't a lot of books on that subject here in Antwerp.
(in the places where the light comes.
And this is very important because if there is some fat left on the on the stone the image will be black.
The stone (sandstone) should also be prepaired with some kind of substance, because the stone is porous. So no chemical residues stay on the stone after it has seen light.
(or after washing it).
The images of the camera obscura is indeed what I want to build, but it shouldn't be a big problem to build it.

 

[billnotgatez]

From the third link I posted (Lithography)

...
Using lithographic turpentine, the printer then removes the greasy drawing material, leaving only the salt layer; it is this salt layer which holds the skeleton of the image's original form. When printing, the stone or plate is kept wet with water. Naturally the water is attracted to the layer of salt created by the acid wash. Ink that bears a high lipid content is then rolled over the surface. The water repels the grease in the ink and the only place for it to go is the cavity left by the original drawing material. When the cavity is sufficiently full, the stone and paper are run through a press which applies even pressure over the surface, transferring the ink to the paper and off the stone.
...

[epeap ed]

yeah I know, but that isn't really the problem. There's also a technique with reflex spray that you can use to transpose a photocopy on the stone.
But taking photo's on a stone in just something that has never been done before, so that's why I want to do this thing....

[epeap ed]

Is there a list or a site that handles photosensitive materials?
Cause I can't find anything on this subject.