I've used this technique before, but I thought I would share a tutorial today.
First using washi/masking tape, affix your stencil to the card base and using an ink dauber, apply ink to create the outline of the selected image. You don't need to fully ink it, you really just need the outline so that you can adhere the pieced cassette.
In actuality, for a card like this you could skip this step, but if your image is more complicated, or you were going to show more than one cassette, this helps with placement.
For the remaining pieces, you'll want to use an extra fine Sharpie marker. As before, place the stencil over your paper and use the Sharpie to color in the lines for the portion of the stencil you are piecing/cutting out. To give you a clear idea of what this looks like, here is on white cardstock:
And this is what the individual patterned pieces look like prior to cutting them out. Keep in mind that unlike above (where these are the last pieces which will be cut out), you need to trace around enough of the stencil so that you maintain the reference lines for the next item to be adhered. So you can see on the orange piece to the left the outer line of the cassette as well as the inner lines where the green piece will fit.
And then adhere to create your finished piece:
Although a little labor intensive, it's a fun and easy technique and also adds some great dimension.
That was a pretty simple way to use the technique, with a focal point, but you can also use the technique on very complex and detailed designs, such as this card with The Crafter's Workshop subway stencil.
This one definitely took a long time, but the results are worth it. Here's a close up view of the piecing.
Piecing isn't for everyone, but if you are a fan with your stamped images, I would encourage you to give it a try with your stencils. I think you'll really love the results, and if you do try it, please let me know, I'd love to see!
Paper/Cardstock: Avery Elle - White and Cream cardstock; PTI - True Black Cardstock; Fancy Pants - True Black 6x6 pad; Basic Grey - Carte Postale 6x6 pad
Stamps: Mama Elephant - Good Times, Wanderlust
Ink: Memento - Tuxedo Black; CTMH - Black
Other: The Crafter's Workshop - Mix Tape and Subway 6x6 stencils; Sharpie - Extra Fine Marker; Kuretake Glue Pen; Tombow - Mono Adhesive