4 The next diagram would look like this. Notice that there is a narrow band of orange afterglow along the top and left edges. This afterglow represents light that would leak out along the open edges. There is no afterglow along the fold because light from the original glow would not leak out there.
SYMBOLS, TIPS, AND TOOLS
The Fold Symbol and the Proper Way to Fold
1 I’m using a square piece of paper which is yellow on one side and white on the other.
2 The arc with a circle on one end and an arrowhead pointing to a tiny circle on the other is called the folding symbol. In this instance it means you should fold the square in half diagonally.
3 To properly make this fold, begin by lifting the bottom right corner and lining it up with the upper right corner. I am curling and not folding the paper.
4 Very carefully align the corners so that they perfectly match (for illustrative purposes, my corners are slightly out of alignment in this photo).
5 Hold the corner down firmly with your left index finger while you apply pressure to the curl with the fingers on your right hand.
6 Commit the fold with your index finger.
7 Your model should look like this.
The Flip Symbol
When you see the flip symbol you should turn your paper over.
Fold and then Unfold Symbol
1 This is the fold and unfold symbol. When you see this symbol you should perform all the steps for the fold symbol just as you did on the top of the opposite page.
2 Now unfold the fold you made.
3 Your square should look like this. Notice that the fold you just made is represented by a narrow line. Normally there won’t be afterglow associated with the fold and then unfold symbol, although I did add afterglow to this diagram to show you where the surface in step 2 went.
The Fold on Both Sides Symbol
1 When you see this symbol, begin by performing the fold indicated on the side facing you.
2 Next, flip your model.
3 Perform the mirror image of the fold you made in step 1 on the other side of your model.
4 Your model would look like this. Next, flip it.
5 Now you have performed the same fold on both sides of your model.
How to Make a Crush-Fold
We make crush-folds in almost every leaf we create. We also use the crush-fold in step 19 of the Basic Flower Form (page 44). Making a good crush fold is a challenge, but obsessing over it is a complete waste of time. None of the crush-folds described in this book will be visible in a completed sculpture.
1 A crush-fold is called for whenever there’s a pocket created by another fold. Narrowing the stem of this leaf created two pockets. We’re going to crush-fold the pocket on the right.
2 All you do is crush the pocket with a finger.
3 Notice that the pocket on the right has been flattened.
How to Make a Pinch-Fold
A pinch-fold is required whenever there isn’t an easy way to make the fold. A pinch-fold, in this book, will always be made on an existing fold line. I also use the same symbol to denote pushing the paper (see the next section).
You will find a detailed explanation of the pinch-fold on page 43.
How to Make a Collapse and the Push Symbol
A collapse is a complex fold where your model folds into itself. The most familiar item you’ve seen collapse-fold is an umbrella. The fold is made up of pre-installed folds which set up the collapse. This fold will seem impossible at first, until suddenly your square collapses!
You will find a detailed explanation of a collapse on page 45.
How to Make a Book-Fold
We call it a book-fold because it’s just like turning the pages of a book. This fold always involves a shape that has several layers. The layers are usually connected to an axis, just like a book’s pages are connected to its binding. The layers can be rotated just like turning the pages of a book.
In this example, a flap is being book-folded from right to left. Notice that after the book-fold there will be three flaps on the left and only one on the right.
The Zoom Symbol
The zoom symbol means the scale in diagrams has changed between steps. As I fold a model it will get smaller, so I will increase the size of the diagrams so you can see them more clearly.
The zoom symbol indicates that the diagram scale has increased.
Mountain and Valley Folds
No origami book would be complete without an explanation of mountain and valley folds. The most important thing to remember is that almost every fold prescribed in this book is a valley fold. Valley folds are denoted by a green dashed line. On