Editing Postmark (section)

== Unusual postmark techniques ==
There have apparently been some postmarks producing a stereoscopic or "3D" effect where a special viewer is required. They are considered more as a novelty than as a practical postmark.<ref>{{Cite journal | last=Snee | first=Charles | title=3-D postmark update: use on postal card in 1993 |journal=[[Linn's Stamp News]] |date=August 9, 2004 |page=35 |url=http://www.httpdemo.com/pr-3350-usps-3d-postmark2.pdf |archive-url=https://ghostarchive.org/archive/20221009/httpdemo.com/pr-3350-usps-3d-postmark2.pdf |archive-date=2022-10-09 |url-status=live |issn=0161-6234 }}</ref> The [[local post]] [[Hawai'i Post]] had a rubber-stamp postmark, parts of which were hand-painted.<ref name="postmarks1">{{cite web |url= http://www.hawaii-post.com/postmarks.html |title=Postmarks |publisher=Hawai’i Post |date=2008 |access-date=February 22, 2009}}</ref> At [[Hideaway Island]], [[Vanuatu]], the Underwater Post Office has an [[Embossing (paper)|embossed]] postmark.<ref>{{cite web |url= http://www.hideaway.com.vu/postoffice.htm |title=World's only underwater Post Office |publisher=Hideaway Island |date=May 26, 2003 |access-date=February 22, 2009 |archive-url = https://web.archive.org/web/20090202223316/http://www.hideaway.com.vu/postoffice.htm |archive-date=February 2, 2009 |url-status=dead}}</ref>