## Origami Interest Group |
Sponsored by the University of Groningen, The Netherlands. |
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- About origami
- Q1: Is there a text notation for origami models?
- Q2: What is the best paper for origami ?
- Q3: What is 'foil' paper?
- Q4: How do I get my fold to keep its shape ?
- Q5: Where can I find a fold for a .... ?
- Q6: Tell me about money folds, daddy!
- Q7: What's your favourite fold ?
- Q8: What's the best book for ... ?
- Q9: What paper sizes are standard?

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But this is also interesting:

It happens that a system has already been devised for converting folding diagrams to a numerical notational system, John Smith's Origami Instruction Language (OIL). Smith, a British statistician and computer programmer, uses a Cartesian coordinate system to locate points on the square and identifies a crease by the two endpoints it connects. The success of Smith's system ensures that establishing a purely numerical representation for each model is possible....The reference is

Alice Gray, "OIL: John Smith's Origami Instruction language," The Origamian 13, no.2, (n.d.), p. 1. (contrib:Angelo Trivelli, from Peter Engel's Folding the Universe)

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Tissue foil can be better for really difficult folds. If you find a particular fold too hard with your fingers, try using tweezers (purists - flame on!!)

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(contrib: Joseph Wu)

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1) Adding a little white glue to the water when wet-folding. 2) Spray-on acrylic coat. 3) Brushing-on clear nail-polish, shellac, etc.Note, however, that doing (2) or (3) will result in the paper soaking up some of the applied material which will cause the creases to expand (unfold) somewhat if you are not careful. In fact, for a model with many delicate creases (such as pleating), (3) will work better than (2) and it should be done in small sections.

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The dimensions of money internationally are (ratios unless stated):

US Dollar All 7: 3 UK Pound All: 49:20 (i.e. nearly 2:1) French Franc 20 Francs 74 x 138 mm 50 Francs 78 x 123 mm (new bill) 100 Francs 84 x 159 mm 200 Francs 92 x 172 mm 500 Francs ? Dutch Guilders 10 Hfl 76 x 141 mm 25 Hfl 76 x 141 mm 100 Hfl 76.5 x 154 mm 250 Hfl ? 1000 Hfl ? Finnish Marks All: 69 x 141.7 mm

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- 8 out of 10 cats prefer Kawasaki's rose, from 'Origami for the
- Connoisseur' by Kunihiko Kasahara. Pretty, but simple.
- Other 'Classics':
- Cuckoo clock (with moving cuckoo) by Robert Lang in The Complete Book of Origami
- Devil by Jun Maekawa in 'Viva Origami'.
- Grand Piano by Patricia Crawford
- Lobster by John Montroll, Animal Origami for the Enthusiast.

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Beginner/Intermediate: Intermediate/Hard: Origami For the Connoisseur by Kasahara. Mathematics: Folding The Universe (origami from angelfish to zen) by Peter Engel. Good Compilation: Origami Omnibus by Kunihiko Kasahara Something I'll _never_ be able to do:Fuller details of all books (ISBN,etc) can be found on the library search service at the Library of Congress. telnet:locis.loc.gov during working hours, 9-5 EST. (tn3270 or line mode, for those in the know).

The call number for papercraft is tt870, use this to cut down your search time. The list is of about 600 books, all languages, and is _incomplete_!!

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The paper formats defined by ISO in the A, B and C series are used today in nearly all countries apart from North America.

The formats have been determined according to the following rules:

- A0 has an area of one square meter.
- The aspect ratio of all members of the A, B and C-series is sqrt(2) = 1.41421...
- You get the next higher format by cutting the paper in two equal pieces parallel to the shorter side. This results again in a 1 : sqrt(2) format (that's the big advantage of this format).
- The size of a B-series paper is the geometric mean between the size of the corresponding A-series paper and the next bigger A-series paper. E.g. B1 is between A1 and A0.
- The size of a C-series paper is the geometric mean between the size of the A-series and B-series paper with the same number.

Width Height A-series 2 (- 1/4 - n/2) 2 (1/4 - n/2) B-series 2 ( - n/2) 2 (1/2 - n/2) C-series 2 (- 1/8 - n/2) 2 (3/8 - n/2)Larger sizes have smaller numbers. Sizes larger than those with n = 0 are written as 2 A0 and 4 A0 rather than A(-1) and A(-2).

The following table lists the official definitions of the paper sizes which are the values from the above formulas rounded more-or-less to an integral number of millimeters:

4 A0 1682 x 2378 2 A0 1189 x 1682 A0 841 x 1189 B0 1000 x 1414 C0 917 x 1297 A1 594 x 841 B1 707 x 1000 C1 648 x 917 A2 420 x 594 B2 500 x 707 C2 458 x 648 A3 297 x 420 B3 353 x 500 C3 324 x 458 A4 210 x 297 B4 250 x 353 C4 229 x 324 A5 148 x 210 B5 176 x 250 C5 162 x 229 A6 105 x 148 B6 125 x 176 C6 114 x 162 A7 74 x 105 B7 88 x 125 C7 81 x 114 A8 52 x 74 B8 62 x 88 C8 57 x 81 A9 37 x 52 B9 44 x 62 C9 40 x 57 A10 26 x 37 B10 31 x 44 C10 28 x 40The most popular sizes are perhaps:

A0 technical drawings A4 letters, magazines, documents A5 books C4,C5,C6 envelopes B4,A3 supported by many copy machines, newspapersThere are also strip formats possible, e.g.

1/3 A4 99 x 210 2/3 A4 198 x 210 1/4 A4 74 x 210 1/8 A4 37 x 210 1/4 A3 105 x 297 1/3 A5 70 x 148 etc.All these formats are paper end formats, i.e. these are the dimensions of the paper delivered to the user/reader. Other standards define slightly bigger paper sizes for applications where the paper will be cut to the end format later (e.g. after binding).

The ISO DL envelope format has the dimensions 220 x 110 millimeters.

(The values have been copied from DIN 476 (Dec 1976) which is the German version of the ISO 216 standard).

American:

Letter size 8.5 x 11 inch

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Last update: 09 March 2000

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