Editing Fountain pen (section)

===Standard international===
[[File:International Ink Cartridge Short.svg|thumb|Dimensions of short International Ink Cartridge]]
Most European fountain pen brands (for example [[Conway Stewart]], [[Caran d'Ache (company)|Caran d'Ache]], [[Faber-Castell]], Michel Perchin, S.T. Dupont, [[Montegrappa]], Stipula, [[Pelikan]], [[Montblanc (company)|Montblanc]], Europen, Sigma, Delta, Italix, and [[Rotring]]) and some pen brands of other continents (for example Acura, Bexley, Esterbrook, Retro51, [[Tombow]], and Platinum (with adaptor)) use so called "international cartridges" (AKA "European cartridges" or "standard cartridges" or "universal cartridges"), in short (38&nbsp;mm in length, about 0.75 [[Litre|ml]] of capacity) or long (72&nbsp;mm, 1.50 ml) sizes, or both. It is to some extent a standard, so the international cartridges of any manufacturer can be used in most fountain pens that accept international cartridges.<ref name="goulet video">{{cite web|last1=Goulet|first1=Brian|title=Who Invented Standard International Cartridges? – Q&A Slices|url=https://www.youtube.com/watch?v=x571al6Y9D4 |archive-url=https://ghostarchive.org/varchive/youtube/20211211/x571al6Y9D4| archive-date=2021-12-11 |url-status=live|website=YouTube (Goulet Pens)|publisher=Goulet Pens|access-date=27 July 2016|date=30 June 2016}}{{cbignore}}</ref>

Also, converters that are meant to replace international cartridges can be used in most fountain pens that accept international cartridges. Some very compact fountain pens (for example Waterman Ici et La and Monteverde Diva) accept only short international cartridges.<ref>{{cite web|title=Fountain Pen Converters|url=http://www.nibs.com/fountain-pen-converters.htm|website=Nibs|access-date=27 July 2016|archive-date=15 July 2016|archive-url=https://web.archive.org/web/20160715074547/http://www.nibs.com/fountain-pen-converters.htm|url-status=live}}</ref> Converters can not be used in them (except for so-called mini-converters by Monteverde). Some pens (such as the modern Waterman models) have intentional fittings which prevent the usage of short cartridges. Such pens can only take a proprietary cartridge from the same manufacturer, in this case the long Waterman cartridges.<ref>{{cite web|title=Which Ink Cartridges Can Be Used With Which Fountain Pens?|url=http://www.nibs.com/FAQInkCartridges.htm|website=Nibs|access-date=27 July 2016|archive-date=28 July 2016|archive-url=https://web.archive.org/web/20160728165358/http://www.nibs.com/FAQInkCartridges.htm|url-status=live}}</ref>