Litho pattern test

Test prints of black and white imagery
a way to make 3D textures directly from 2D images
special thanks to the information in this:
http://www.instructables.com/id/3D-Printed-Photograph/
to eventually get to this:
http://www.springwise.com/3d-printed-kids-books-enable-blind-readers-visualize-story/
or this:
http://3dprint.com/6823/3d-print-book-blind/
http://www.tactilepicturebooks.org/
The plus:
these prints are crazy fast with minimal use of material