15 years ago
into 4-color plates for intaglio printing.
The process would go something like this:
1. Convert the CMYK image into 4 separate halftone files.
2. Use the individual files to engrave or mezzotint four separate copper
(or other metal) plates, keeping the image placement on each plate
(registration) consistent. Registration marks would also be needed.
I googled around on this, and it appears there is software available
which converts halftones to G-code.
Some more details: I usually use 12x18 copper plates, but for initial
trial of this idea, smaller plates would be fine, eg, 5x7. Although I
use copper, steel plates would be fine, and might even be preferable.
In addition to straightforward (ha) milling of the halftones, I'm
interested in the idea of "cnc mezzotinting." Instead of the milling
implement cutting the metal, imagine it "pecking" the metal with a sharp
point. The number of "pecks" would be in proportion to the size of the
halftone dot. I suspect this could lead to some interesting results in
terms of metal being displaced above the surface, in addition to holes
below the surface.
If anyone can provide this service, or you know someone who can, please
let me know. I'm also interested in hearing estimates on what it might
cost to have this done.