Broken lines represent creases. When creasing the polyester, place the straight-edge on the film with its edge next to, but not covering, the two dents to be used as guides. Create a crease by pressing down on the point of the bone folder while pulling it along the edge of the straight-edge. The straight-edge should be held down firmly to prevent slippage. Cut as shown in figure 9.
Unbroken lines represent cuts.
Figure 9. . Fold the polyester film at all creases. Make the folds sharp by burnishing them with a bone folder. Dampening your finger tips slightly with a moist sponge will make this shaping of the folds easier. Figure 11. .