Ronald Koh - 1988
Use a thin sheet of paper or
tissue foil of at least 15 cm
Fold diagonally in half from left to right,
crease well, and unfold. Repeat by folding
in half from top to bottom, and unfold.
Valley fold the lower diagonal edges to the
crease line in the centre and turn paper over.
Fold down the triangular
section at the top and turn
Open out to the sides, effectively
unfolding Step 2.
Make two diagonal folds as illustrated, in line
with the edge of the triangular layer underneath.
Crease firmly, and unfold.
Lift up the triangular piece from behind.
Repeat from Step 2 on the lower half of the
paper, then turn the paper over.
Valley fold through the circled intersecting
crease lines, crease firmly, and unfold.
Collapse the paper along the illustrated
mountain and valley folds ...
... like so. Now fold the diagonal edge in the
middle to the vertical crease in the centre,
crease firmly, and unfold. Repeat on the
Pull the flaps on each side slightly apart and
sink fold. You may need to stick a finger
through the underside to guide the sink fold
precisely along the crease lines made in Step
10. Repeat on the other side.
Flatten the rest of the model to the position
at Step 10.
Separate the two diagonal edges on the
right and squash fold. Repeat behind.
Fold the bottom corner to
the top, crease well, and
Separate the two diagonal
edges and squash fold
Fold and unfold, creasing
... then petal fold.
Fold the triangular flap
... then fold the flap on the
left to the right. Repeat
from Step 15 on the next
flap on the left.
Grasp the circled point
and gradually pull the flap
upwards as far as it can
go, opening out and
flattening the layers
... like this, before bringing
down the flap again.
The model should now look
like this. Turn the model over.
Repeat Step 15 on the
right, and then on the left.