Yoshizawa-Randlett System
COMMON OPERATIONS
In this section, let's talk about some common operations in origami, with the diagrams in the Yoshizawa-Randlett System. These all are fairly easy, some of them might be a bit tricky. The pleat folds and reverse folds are often done with the two creases at an angle. Reverse folds of a corner are typically used to produce feet or bird heads.
The sink fold is considered intermediate to high skill. The version in the images below is called an open sink. There is another version called a closed sink which generates a triangular pocket with no flaps showing. In simple cases, the model can be partly unfolded and then folded with the sink in place. Now what I want you to do is:
-------> Grab a square of paper.
-------> Get seated at a comfortable place. My friend, do fold on a flat surface!
-------> Follow the instructions given in the images below. Start practicing! Remember, the dashed line- valley folds, the dashed and dotted line- mountain folds!
INSIDE CRIMP
OUTSIDE CRIMP
INFLATE. Note that this is a waterbomb design, fold that first!
INSIDE REVERSE FOLD
OPEN. Remember to follow the valley and mountain folds!
OUTSIDE REVERSE FOLD
PULL. Guess which fold is this. If you guessed the fold, pleat, you are correct!
BRING THE POINTS TOGETHER.
REPEAT. The arrows in sequence from up to down show repetition, one, two, and three times.
ROTATE
OPEN SINK
PLEAT FOLD, ALSO CALLED ACCORDION FOLD
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