Origami Document folder instructions

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diff --git a/source/folding_paper/index.rst b/source/folding_paper/index.rst
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+###############
+ Folding Paper
+###############
+
+This part is for crafts that involve folding paper: origami,
+letterlocking, etc.
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+   origami/index
+
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+         xml:space="preserve"><tspan
+           style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222px;font-family:FreeSans;-inkscape-font-specification:'FreeSans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583px"
+           y="105.96803"
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+           sodipodi:role="line">90</tspan></text>
+    </g>
+    <text
+       id="text178"
+       y="129.11198"
+       x="9.7339821"
+       style="font-size:3.52778px;line-height:8.26823px;font-family:FreeSerif;-inkscape-font-specification:FreeSerif;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       xml:space="preserve"><tspan
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:3.52778px;font-family:FreeSerif;-inkscape-font-specification:FreeSerif;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px"
+         y="129.11198"
+         x="9.7339821"
+         id="tspan176"
+         sodipodi:role="line">Do you know the author of this model? please let me know!</tspan></text>
+    <text
+       id="text1197"
+       y="135.82076"
+       x="10"
+       style="font-size:2.82223px;line-height:0;font-family:FreeMono;-inkscape-font-specification:FreeMono;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;fill:none;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       xml:space="preserve"><tspan
+         style="line-height:1.2;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px"
+         y="135.82076"
+         x="10"
+         id="tspan1195"
+         sodipodi:role="line">valhalla+origami@trueelena.org</tspan><tspan
+         id="tspan1199"
+         style="line-height:1.2;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px"
+         y="139.20743"
+         x="10"
+         sodipodi:role="line">@valhalla@social.gl-como.it</tspan></text>
+    <text
+       id="text1335"
+       y="10"
+       x="52.330662"
+       style="font-size:2.82223px;line-height:6.61458px;font-family:FreeSans;-inkscape-font-specification:FreeSans;text-align:center;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:none;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       xml:space="preserve"><tspan
+         style="font-style:normal;font-variant:normal;font-weight:600;font-stretch:normal;font-size:5.64444px;font-family:FreeSans;-inkscape-font-specification:'FreeSans Semi-Bold';fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px"
+         y="10"
+         x="52.330662"
+         id="tspan1333"
+         sodipodi:role="line">Document Folder</tspan></text>
+    <text
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+       xml:space="preserve"><tspan
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:4.23333px;font-family:FreeSans;-inkscape-font-specification:'FreeSans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;stroke-width:0.264583px"
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+  </g>
+</svg>
diff --git a/source/folding_paper/origami/document_folder/index.rst b/source/folding_paper/origami/document_folder/index.rst
new file mode 100644
index 0000000..c9e2e6d
--- /dev/null
+++ b/source/folding_paper/origami/document_folder/index.rst
@@ -0,0 +1,60 @@
+Document Folder
+===============
+
+.. .. figure:: document_folder.jpg
+   :align: center
+
+.. only:: html
+
+   .. contents::
+
+This is a practical and useful document folder with a lot of pockets.
+
+The model is not mine, but I've found it somewhere on the internet in
+the early 2000s and can't find the original source. I've drawn and
+written the instructions from scratch by looking at a model I had folded
+back then.
+
+Materials
+---------
+
+You will need a rectangular sheet of paper.
+
+The size of the fold at step 3 will be size of the spine, and will also
+regulate how much overlap there will be at step 7 to hold the folder
+together.
+
+Some size suggestions:
+
+* A4 paper with 1.5 cm fold: good for A8 paper and 85 mm * 54 mm
+  business cards;
+
+* 60 cm × 40 cm with 4 cm fold: suitable for A6 paper;
+
+* 50 cm x 70 cm with 4 cm fold: suitable for A5 paper.
+
+Instructions
+------------
+
+.. figure:: document_folder_origami.svg
+   :align: center
+
+1. Fold in half on the long side, crease and reopen.
+
+2. Fold in quarters, crease and reopen.
+
+3. Fold down the top and bottom edges a bit: this will be the width of
+   the spine.
+
+4. Fold down the four corners to touch the quarter creases.
+
+5. Fold down the top and bottom edges, following the quarter creases.
+
+6. Mountain fold the side edges; turn over the model.
+
+7. Insert the left side in the triangular flaps of the right side.
+
+8. Fold in half on the remaining crease.
+
+9. Turn conterclockwise 90°, done.
+
diff --git a/source/folding_paper/origami/index.rst b/source/folding_paper/origami/index.rst
new file mode 100644
index 0000000..9f0c938
--- /dev/null
+++ b/source/folding_paper/origami/index.rst
@@ -0,0 +1,10 @@
+*********
+ Origami
+*********
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+   document_folder/index
+
diff --git a/source/index.rst b/source/index.rst
index d899c1a..4b800bb 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -73,6 +73,7 @@ Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
    :maxdepth: 3
    :caption: Contents:
 
+   folding_paper/index
    bibliography/index
 
 .. only:: draft