$ Butterfly Copyright 1998-99 Stephen Hecht. All Rights Reserved A dollar bill makes a model 55mm long with a 65mm wingspan. For your first attempt, begin with a 3x7 rectangle larger than a dollar bill. 3. Soft mountain-fold 2. Crease halfway, 1. Begin black side up. on 45-degree line. making a mark. Valley-crease, the horizontal not too sharply. Turn over. 4. Pinch where mark from 5. Use mark from previous 6. Use the 2 existing step 2 hits edge. Unfold. step to make this valley- creases to add 3 more. fold. Unfold. 7. Pinch halfway marks 8. Mountain in half. 9. Crease and unfold. where indicated. 10. Crease and unfold, bisecting. 12. Reverse-fold. 11. Reverse-fold, in-and-out. Crease from previous step will align with vertical crease. $ Butterfly (continued) Copyright 1998-99 Stephen Hecht. All Rights Reserved 13. Pleat top layer on 15. Pleat top layer, softly 14. Reverse-fold, following existing creases. on the dotted line. the hidden edge. Unfold to step 13. 18. Creases exist as shown. 17. Bisect angle. Softly on 16. Follow hidden vertical edge. dotted line. Unfold to step 13. Softly on dotted line. 13-19 fudge here A B 19. Collapse on the creases. 20. Note that A does not 21. Pleat. Mountain-fold is the First close up the mountain- reach corner. Repeat 13- existing half-line. For the valley, fold triangle, pinching the tiny 19 on rear flap. bring the 1/4-mark to lie under new valley-fold. Then flatten B . The dotted line is a hidden to form mountain-fold A . mountain-fold caused by shifting paper. $ Butterfly (continued) Copyright 1998-99 Stephen Hecht. All Rights Reserved 22. Note shifted creases in fudged area. It needn t be 23. Close-up of right edge. 24. Fold and unfold (bisection), precise, it will be hidden later. Fold and unfold to hidden edge aligning previous crease with Repeat 21 behind. (hold model up to the light). hidden edge. 27. Fold and pinch, where 25. Reverse-fold, in-and-out. 26. Reverse-fold. These limited by most recent steps are similar to 9-12. reverse-fold. Turn over. 29. Push from behind and create 30. Begin to flatten by pinching a new mountain-crease linking where shown. Swing the the base of the reverse-folds to 28. Undo the reverse-fold standing edge to the right. the pinch mark of step 27. from step 26. Then spread the area towards the right. $ Butterfly (continued) Copyright 1998-99 Stephen Hecht. All Rights Reserved D C align 32. Swivel. The upper crease 33. Wrap top layer around to 31. To flatten, first align bottom partially exists. Use it to start the inside. Reverse-fold edges. Then flatten C , then the swivel and locate the end corner, noting the bisected flatten D . Careful of tearing of the vertical crease. angle. due to imprecision. 36. Reverse the two creases 34. Reverse-fold hidden 35. Crease and unfold. just made and add the tiny corner, bisecting. Then Lower crease bisects. Upper mountain-fold, pushing edge unfold it. crease aligns vertical edges. towards the left (model not flat). C 23-39 38. Model is flat again. Swivel 37. Still pushing towards the left, 39. Curve the tip towards you on existing creases and tuck also push in at the tiny valley-fold, a bit. Helps keep together. between layers. swinging the point down to align Repeat steps 23-39 on the with edge C . other wing. $ Butterfly (continued) Copyright 1998-99 Stephen Hecht. All Rights Reserved E 41. E is the mark made in step 40-41 7. First make the long mountain- 40. Entire model again. 42. Thus. Repeat 40-41 on folds. Then make the left valley Spread upper layers a bit. other side. Then open model (an exact bisection). Then make out. the right valley (not an exact bisection), closing up the model. 43-44 43. Valley-fold, limited by the 45. Closed-sink central ridge 44. Valley to previous crease folds of step 41. If you have halfway. and unfold. Repeat 43-44 on the been accurate, it will hit the left. Close up the model again. bottom corner. Unfold. 47. Reform valley-folds from 48. Mountain to shape wing. 46. Tuck into sink, creasing 44, then valley folds from 43. Reverse-fold at overlaps to help sharply. Repeat behind. Close up model, adding new secure. Repeat behind. Bottom Then open model again. mountain folds. half is now done. $ Butterfly (continued) Copyright 1998-99 Stephen Hecht. All Rights Reserved 50. Lift the single-ply 51. Reverse-fold the small reverse-fold , exposing the 49. Top of model. Closed sink corner, and close up the model. underside of the sink. (limited by paper at right). Then This distributes the layers of lift wing. the sink more evenly. 52. Squash the flap lifted in 53. Squash again. 54. Wrap raw edge to the step 50, on existing creases. inside. 49-55 55. Tuck long flap into 56. Like so. Repeat 49-55 57. Double-rabbit-ear the point sunken pocket. Mountain- on other wing. to form antenna. Repeat fold to shape wing. Reverse- behind. Distribute layers evenly. fold at overlap to help secure. $ Butterfly (continued) Copyright 1998-99 Stephen Hecht. All Rights Reserved 58. Curl antenna. Fold wings, 59. Finished. not too sharply, where limited by body. Repeat behind.