Hi there ,
Its possible to order any spectrum curved filter from labs. And virtually , its possible to customize your filter to your main panchromatic emulsion.
I am thinking to order RGB or more filters to resurrect the lost processes like Autochrome or Kodachrome or PT PD or glass negatives because I dont have resources
Its about taking multiple bw negatives and than paint or tone with software.
Can it be done ? or am I missing something ?