Text-Only Instructions -
Credits and Resources:
This is one of many types of letterfolds I have folded without any external reference or resource.
It is named for its unusual shape in order to distinguish it from the many other models that fall into the category of envelopes, notes and letterfolds.
If you are aware of any other source where this model or similar might be listed with accompanying pictures or illustrations, please let me know so I can reference it under this heading.
Paper to be used: Rectangular, any size; use large paper, copy or printer paper will work well, to practice with at first.
Folding level: Easy/Beginner
Steps: 11
Description: This is a fairly secure, flat envelope with a diagonal crease running across the back and two small, folded corners on opposite sides of the diagonal crease.
The front of the letterfold has a smooth surface with two opposite corners missing, giving the appearance of a rectangular envelope that has had two of its corners cut.
If folded from A4 or copy paper, the size of the folded model will be about 10 cm x 15 cm or 4 inches by 6 inches, which is quite large, so consider folding this model from a smaller rectangle if you are wanting a smaller envelope.
Remarks:
The purpose of a letter fold is to fold a note or message into a small shape that could keep the contents hidden from prying eyes and to secure the fold in some way so it can not be opened easily.
Apart from serving the above purpose, many letter folds are also examples of the creativity and simple genious of what origami is all about.
Thus, this letter fold can be used to enclose a written message or note, a small gift card, some money or any small, flat object that will fit into the finished model.
Place it on top of a gift to lend a personal, decorative touch or teach this wonderful fold as a quick children's project.
Fold as a note or place a small gift inside to say thank you after a birthday or wedding or any other occasion.
The model is quite secure as long as you do not fill it with things that are heavy or bulky.
Use a decorative sticker or glue dot for extra security if preferred.
These envelopes can also be used for advent calenders. Secure with a sticker or glue after they have been filled.
If using two-sided paper, lay your paper with the patterned or colored side down and the message, if you have written one, facing up, before starting to fold.
Step 1
Place your rectangle down with the long edges facing left and right or in portrait orientation.
Step 2
Fold the top edge down to meet the bottom edge. Pinch the left and right sides without making a fold if you would like to avoid a diagonal fold line across the front of your finished model.
Otherwise, crease from left to right and unfold to create a center horizontal line.
Step 3
Fold the left bottom corner up so the left edge meets the center horizontal crease you have just made.
Crease well and leave folded.
Step 4
Fold the right top corner down so the right edge meets this same center horizontal crease.
Crease well and leave folded.
Result: Your model will comprise two large triangles, one above and one below the center horizontal crease line.
Notice that you will have two unfolded, long rectangular areas on the top left and bottom right of your folded triangles.
Make sure you keep your model oriented so its horizontal center crease runs from left to right in front of you for the next steps.
Step 5
Next, you will fold the single-layered rectangle on the top lefthand side in half. Put in another way, fold the left edge of the model over to the right so it lies next to the straight edge of the triangle on its right.
Crease well and leave folded.
Notice that you now have a long, folded strip of paper along the top left side of your letterfold, sloping towards the left at its bottom end.
Step 6
Now, make a similar fold with the single-layered rectangle on the bottom righthand side.
To do this, fold the right edge of the model over to the left so it lies next to the straight edge of the triangle on its left.
Crease well and leave folded.
Result: You now have a matching long, folded strip of paper along the bottom right side of your letterfold, sloping towards the right at its top end.
The folded model will now resemble a lop-sided diamond shape. Make sure that you keep your paper so the horizontal center crease runs from left to right in front of you.
Step 7
Fold the left top corner down so the left edge meets the center horizontal crease once again.
Put in another way, bring the left top corner all the way down to meet the small corner just above the center horizontal crease on the right.
Crease well and leave folded.
Step 8
Fold the right bottom corner up so the right edge meets this same center horizontal crease.
Crease well and leave folded.
Result: Your model will once again comprise two opposing triangles, with a horizontal crease line separating them.
Step 9
Find the loose flap of the top triangle and lift it up to reveal a small triangular pocket on the right edge of the model.
Tuck the point you have just lifted into this small pocket and press flat.
Step 10
Repeat with the bottom triangle, finding its loose flap and tucking it into the small triangular pocket you will find on the left edge of the model.
Step 11
Turn your model over and rotate it slightly so it resembles a rectangular envelope, except that the folds you have made have caused two opposite corners to appear as if they have been snipped off.
Leave as is or secure with glue, a sticker, ribbon or other closure and/or embellishment.
Making origami accessible to visually impaired crafters through text instructions.
for non-commercial use only.
Compiled by Lindy van der Merwe, August 2015
Revised, April 2024
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