Collotype in Camera, Dichromated Positive Paper, silver and tanned gelatin together

[Mustafa Umut Sarac]

Hello there,

I am thinking on possibility to use positive paper , sensitized with dichromate and used at camera. I think pinhole camera is enough to transmit strong summer uv on paper with other spectrum, the daylight. If I am not wrong , uv would tan the paper gelatin and daylight slowly expose the silver grains and development will result with two different spectrum photograph within each other and two different qualities , one grades of silver , second grades of gelatin.

What do you think about that ?

Umut

 

[Mustafa Umut Sarac]

I remember photographic paper emulsion is so hard and refuses to tan with pyro. Is it correct for above , it would not be too hard to cast a dichromated gelatin in a mold or coating a glass plate. What do you advise if post 1 or post 2 correct ?

Umut

 

[Mustafa Umut Sarac]

I have just contacted with PE and he wrote '' YES'', its possible to my first question. Now I am waiting how to sensitized the paper or film to be tanned by uv but also capture silver image !

 

[Mustafa Umut Sarac]

I have contacted with alt photo list and someone said , if everything slow , it will fog. I dont know to sensitize film gelatin to uv with highest speed and I need your help.

Umut