Customized version of http://www.thingiverse.com/thing:74322

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=74322

This thing can produce Lithopanes or Lithographs both of which are cool but the lithopanes you back light and the lithographs you don't. It makes them look like negatives.

The secret is you have to use the option in Customiser to reverse the colors for a Lithopane. Thats it.

The Gadsden flag here is a Lithopane I did a lithograph of it as well
Its here http://www.thingiverse.com/thing:84097

Using the following options:

layer_height = 0.2
number_of_layers = 12
hole_diameter = 10
image_file = lithopane20130506-17926-11oi06p-0.dat