In article s.com,
(shmoeusn) wrote:

responding to
http://www.rittercnc.com/metalworkin...ng-498310-.htm
shmoeusn wrote:
is it possible to achieve the various shades of black and gray to etch a
photograph with this method?

You probably need to screen it, like a halftone photo in a magazine.

http://en.wikipedia.org/wiki/Halftone


Joe Gwinn