I finally got the process as far as this, it’s about as far as I’m going to take it for now.
This is a contact print from a lith negative. I coated both sides of a glass plate (gives a nice three dimensional effect) in a solution of violin rosin in ethyl alcohol (0.5g in 100ml) and then contact printed it for about three days exposure to blue sky on a window sill (this is not instant photography – If exposed to direct sunlight it’d be far faster), then developed it by exposing it to the fumes of mineral turps from about 1cm away on a flat plate. A separate development for each side.
This is the process that Niepce referred to briefly in one of his letters to Dageurre in the 1820’s – he said that printed on glass it makes a pleasing image when viewed in front of a dark surface. This (mine) is sandwiched in a black perspex case with a glass cover to protect it. I offered this to Geoffery Batchen, but he never responded, so it’s going in a box I guess.
I’m not taking this experiment any further for the forseable future, I’m thinking of a project involving travel, that and paying down a 78 thousand dollar student loan 😛