Step 5Fuse layers of bag together to make the main body and plain pocket pieces
make #2: #3 layers of clear squares on top of #3 layers of black squares to make one 8x8 (20.5x20.5) sheet. These become the passport and angled pockets. Set aside.
Remember to fuse between sheets of parchment with a lot of ventilation around you. Do not contact the plastic directly with your iron. If you do it will melt immediately, so wipe it off the iron with a dry rag while the iron is still hot. The temp that worked on the iron I used was just between 'wool' and 'cotton.' Keep your iron moving at a slow and steady pace using moderate to firm pressure. Adjust the iron temp as needed. Some plastics fuse and shrink more than others. When you combine plastics that shrink differently, you get curling.
a. Test fusing only the black pieces together, then fusing the black plus clear together. It should not bubble, but it may make an interesting puckering pattern. In the messenger bag video they recommend using wax paper, but I prefer parchment. The same two pieces can get you through the whole project. When you are melting and fusing properly, the plastic looks like it becomes a little greasy and sticks slightly to the paper.
Test fusing: Place #4 layers of black plastic bag between two pieces of parchment paper. Run the iron over for a little bit. Flip the whole parchment paper & plastic sandwich and iron the other side. Get a good feeling for how much you need to iron to get it fused together. I used a piece of thick aluminum sheet metal to rub the surface of the sandwich to suck up the heat and help keep the pieces from curling. Check the plastic to make sure it's one piece and not still in layers. Re-iron if needed. Next try fusing three layers of clear to three layers of black. Save the test pieces you've made for testing how the material goes through the sewing machine and making appropriate adjustments for tension.
b. When you think you have mastered fusing, proceed to fusing the work pieces listed above.
Note: The quantities listed for how many layers you fuse together relate to the thickness of the trash bags I used. If you use thinner bags you'll have to fuse more layers together. The clear liners I used were thinner than the black bags. You want to end up with thick, but still flexible material. The pocket pieces should be slightly thinner and more flexible than the main body pieces.
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