Re: [Origami] precrease precrease precrease then collapse!!!

[Papirfoldning.dk]

On 28 Apr 2026, at 22.19, Lorenzo via Origami <origami@lists.digitalorigami.com> wrote:  On Mon, 27 Apr 2026 at 20:10, Diana Lee via Origami <origami@lists.digitalorigami.com> wrote: I always call them "crease and collapse" models.   In theory, therefore, in all those cases where we fold and unfold, we should say "pre-crease." We don't do this, I think, intrinsically to avoid making the description of the steps cumbersome, but formally it would be correct, in my opinion. Because the crease will only be final at a later stage. An interesting analysis.  As I read the dictionaries "a crease" (noun) is the line in paper or cloth made by folding, whether that fold is unfolded or not, and thus "to crease" can be both "fold" and "fold and unfold". So, I agree it is more precise to say "to precrease" when we fold and unfold, since the result of that is a crease, or crease line. "To crease" can be both "to fold" and "to fold and unfold". Hence it is not wrong to call the method "crease, collapse, shape" as the context makes it clear that the form of crease meant is "fold and unfold". I am used to "precrease, collapse, shape", but I really like the catchy alliteration of "crease, collapse", and since it seems correct I might use that going forward. Btw., when I write the text for a folding step in a diagram, I write "Mark the diagonal" or "Mark the line" when I do the entire line. Normally it is implied that it is to be done by folding and unfolding, but you could mark it by, e.g., scoring. And indeed, crease lines can be made with vinyl or laser cutters or manually by a pen. A linguistic note: The word "crease" does not exist in Danish. It is translated into "fold" (yes, the same word as in English), and if we mean the line resulting from folding, we must say "foldelinje" ("folding line"). Similarly, "crease pattern" becomes "foldemønster"; we never say "*foldelinjemønster" ("*folding line pattern"). This makes a Dane see the "crease" of "crease pattern" as the verb, not the noun. Disclaimer: I'm not a native English speaker, so my intuition may be off. Also, I tend to look up the British English forms though they seem to coincide in this case. The dictionaries say this: Oxford Dictionary of English (2003): - crease: noun 1 a line or ridge produced on paper or cloth by folding, pressing or crushing: khaki trousers with knife-edge creases. - a wrinkle or furrow in the skin  - fold: noun 3 a line or crease produced in paper or cloth: a fold of paper slipped out of the diary. (no entry for precrease). Merriam-Webser (online today): - crease noun 1 : a line, mark, or ridge made by or as if by folding a pliable substance - fold noun 1 a part doubled or laid over another part. Pleat. 2 a crease made by folding something. 3 something that is folded together or that enfolds. - precrease verb : to crease something in advance: precrease seams with an iron; sells precreased cards for inkjet printers Collins (online today): - crease 1 (countable noun) Creases are lines that are made in cloth or paper when it is crushed or folded. Synonyms of crease (noun)  in the sense of line: line, corrugation, fold, groove, ridge, wrinkle   - fold 3 (countable noun) A fold in a piece of paper or cloth is a bend that you make in it when you put one part of it over another part and press the edge.  4 (countable noun) The folds in a piece of cloth are the curved shapes which are formed when it is not hanging or lying flat. Synonyms of fold (noun)  in the sense of crease: crease, bend, furrow, overlap, pleat, wrinkle   - precrease verb (transitive) to provide (e.g. clothing, paper for origami) with a crease or creases in advance. Best regards, Hans