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Step 5Applying the Template to Plastic
Take the printed template, and double-sided tape it firmly onto the back of your polypropylene sheet. The idea behind using a translucent colour is that you can see the template through the plastic.
You then need to take up your scapel again, and cut along the outline, MINUS the tabs (ignore these and cut staight down the fold, they aren't needed). Following this, grab the metal ruler and use the corner to score along all the mountain and valley folds. In early models, I flipped the plastic and scored mountain and valley folds on opposite sides, but I found that as long as scores were made, the plastic would fold either way easily.
The rationale behind the metal ruler is that some trials with a scalpel or soldering iron occasionally went all the way through - as you can imagine, holes aren't a good feature in a cup.
You then need to take up your scapel again, and cut along the outline, MINUS the tabs (ignore these and cut staight down the fold, they aren't needed). Following this, grab the metal ruler and use the corner to score along all the mountain and valley folds. In early models, I flipped the plastic and scored mountain and valley folds on opposite sides, but I found that as long as scores were made, the plastic would fold either way easily.
The rationale behind the metal ruler is that some trials with a scalpel or soldering iron occasionally went all the way through - as you can imagine, holes aren't a good feature in a cup.
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