Editing Loose leaf (section)

== Design ==
[[File:Binder-based and discbound loose leaf systems.jpg|thumb|A (smaller, [[ISO 216|A5]]-size) binder and a (larger, [[Letter (paper size)|letter]]-size) discbound notebook]]

=== Loose leaf systems ===
There are two main types of loose leaf systems:

* [[Ring binder|Binder]]-based loose leaf systems, which uses a binder to hold pages. The binder is typically metal, but some slim binders (mainly manufactured by Japanese companies such as Kokuyo, MUJI and King Jim) may be made of plastic. In North America, 3-hole binders for letter-size papers typically have a width of 1/2 inch, 1 inch, 1.5 inches, 2 inches, 3 inches or 4 inches; in ISO system, binders typically have a width of less than 3&nbsp;cm.
* “[[Disc-binding|Discbound]]” loose leaf systems, which uses separate “discs” to hold covers and pages. Staples and Office Depot sell discbound notebooks with disc diameters of 3/4 inch, 1 inch and 1.5 inches; KW·TriO (可得优), a Chinese company, produces discbound notebooks whose disc diameters are 10mm, 15mm, 20mm and 25mm, whose products are also sold in India. (The hole thus [[Hole punch|punched]] for a discbound loose leaf system is called “香菇孔” (“mushroom hole”) by KW·TriO.)
A loose leaf system typically contains specially designed [[hole punch]]es that can be used to punch holes on any common, standard-size paper so that they can be arranged into the loose leaf system. These hole punches are sold by the companies alongside their loose leaf binder or paper products, and usually there are third-party components for sale as well.

==== Orientation ====
Loose leaf systems may be “horizontal” or “vertical”. A “vertical” orientation has the punched holes along the longer side of the paper. Most loose leaf systems are vertical. Exceptions include Maruman's Mini (“ミニ”, of [[ISO 216|B7 size]]) binder system.

=== Loose leaf papers ===
There are four common types of loose leaves: (1) [[ruled paper]] (ja: 横罫. North American sizes include [[wide ruled]], [[college ruled]] and narrow ruled, the line height of which are approximately {{convert|11/32|,|9/32|and|1/4|in|mm}}, respectively, attending to different people's needs. In ISO loose leaf system, line height of 6mm, 7mm, 8mm and 10mm are common, typically simply referred to as “6mm罫”, “7mm罫” etc.), which may have “assistive (vertical) lines” (アシストライン), aiding in alignment across lines,<ref>2023-2024 Maruman General Catalog, Page 31. https://www.e-maruman.co.jp/catalog/book/html5m.html#page=1</ref> (2) unruled (or "blank", 無地), (3) dotted (ja: ドット方眼) and (4) [[graph paper]] (or "grid paper", 方眼罫. In North American systems, the size of a grid is typically {{convert|1/4|in|mm}}; in ISO system, it's typically 5&nbsp;mm). College ruled paper has less space between the blue lines, allowing for more rows of writing. Wide ruled paper is intended for use by grade school children and those with larger handwriting.

Companies also sell pre-printed calendar loose leaves.

=== Accessories ===

* [[Card binder]] (for holding cards)
* [[Punched pocket]] (for inserting paper)
* [[Hole punch]] (for punching holes)
* Ruler (which can be attached or detached easily from the binder system)

=== Special functionalities ===
[[JL Darling]] produces waterproof Rite in the Rain loose-leaf paper for outdoor (e.g. field) purposes.