Quote Originally Posted by Mustafa Umut Sarac View Post
I found a idea and want to ask your opinions.

[*=center]I am thinking to buy a very fine quality autochrome 3''X4'' plate , than remove its bw emulsion and contact copy the autochrome RRGGBB screen on to 4x5 negative color film.

Mustafa Umut Sarac
This Can NOT BE DONE. Autochrome plates are not RGB and the nature of the coating process in an autochrome is randomized, getting the donor registered in future tests on such a complex dispersion will be extremely difficult. This is a very bad approach.