Step 5: Cut Picture
Then start cutting! Get your knife and follow the template.
You need to gauge how hard to press the knife. You need to press hard enough to get through the duct tape but not go through the card. That's probably the hardest part. You can always practice before hand.
You don't need to follow the lines exactly, but like I said before the more time and detail put in to it, the better the result (or so I think). If you look at the finished picture you can see the shadow on the left of his face I did with a smooth curve, on the right I followed a rougher line. Decide which you think is best, and go with that method!
Once your done, remove (what's left of) your template. This will leave you with a 1 colour picture with lots of cuts in it!
Note: A craft knife would have been much easier than the knife I used, so get the best knife you can!!