Fig. 28—Paper with sides bent down, making four layers.
| blah | center |
Fig. 29—Paper ready to turn back lower corners.
Fig. 30—Ready for folding back the upper corners.
Fig. 28—Paper with sides bent down, making four layers.
| blah | center |
Fig. 29—Paper ready to turn back lower corners.
Fig. 30—Ready for folding back the upper corners.