As well as rediscovering the beauty of monochrome, you'll also add a clear, gloss spot UV varnish to selective areas; this will have the effect of highlighting and drawing attention to parts of the design when the printed piece is moved under different light conditions
This method involves placing an Illustrator file (the tattoo source image) as a Smart Object, using the Free Transform/Warp Tool, adding a Gaussian Blur (to adjust the 'Focus')