I am doing some test pieces for a birthday present map of Paris for my daughter. To test settings and get a sense of the contrast of some map art I decided to do some tests on .013" thick white poster board.
When my engrave was done I was stunned to discover that the laser had blasted right through almost all of the image, but only in the dots created by the engrave. Being able to look through a lacework picture on lowly Bristol board is crazy cool.
I want to explore mounting the output on a vivid coloured background matte and putting glass in front, as the engraved result is very fragile.
Back lighting does not create a very attractive look IMHO
Edit April 28, 2020
Mounted the middle sized version in a Rosewood frame I made. I put a sheet of brilliant blue coloured paper from Staples behind for contrast & engraved the back to make it birthday special.
Someday if I find a very thin light source I can back light it