While looking at all the old processes their were many that caught my eye, yet I really liked the Ambrotype. A process which is still being done yet has a very vintage vibe. When I was looking up photos their were multiple that caught my eye that had a similar thing in common; no frame.
The process is :
There were two stages to producing an ambrotype:
Dissolve gun-cotton ether to produce collodion. Alcohol was also required at this stage.
Add bromides and iodides to the collodion mixture and coat one side of the glass plate, to achieve an even coating of collodion.
Some early reports describe the solution as sticky and having to be spread onto the glass plates.
Ken Watson describes it as thinner than water, and says that it was poured onto the glass plate.
Sensitise the glass plate. This was done by placing it for two minutes in a "silver bath". This was usually a light-tight container containing silver nitrate dissolved in water.
Transfer the plate, in a darkroom, under a red safelight, into a plate holder, then transfer the plate holder into the camera.
Take the photo while the coating just wet and very delicate. An exposure of several seconds would be required - perhaps 3 sec at f16.
Develop the wet negative.
Originally, pyro-gallic acid was used as developer.
Later, in the 1860s, the developer used was ferrous sulphate (15gm), acetic acid (14ml), alcohol (14ml), water (400ml)
Fix in hypo or a cyanide solution, rinse and dry.
Coat with a gum sandarac varnish to help to protect the collodion layer.
B Present the negative against a dark background:
1. Selectively bleach the negative (if necessary)
2. Provide a black background, either by painting the back of the glass with shellac or mounting the the glass on top of black velvet.
3. Mount in a case behind glass, as for daguerreotypes.
Two of the artist I found who still work on Ambrotypes are Davide Rossi an Italian artist and Ellie Young from Victoria Australia. I really like the look of their pieces and the objects they used.