Changes

==In China==

==In China==

Seals using imagery for personal identification date back at least as far as the 5th century BCE.<ref name=aurel>Gallery labels, British Museum.[https://www.flickr.com/photos/toranosuke/46725214685/in/photostream/]</ref>

Seals using imagery for personal identification date back at least as far as the 5th century BCE.<ref name=aurel>Gallery labels, British Museum.[https://www.flickr.com/photos/toranosuke/46725214685/in/photostream/]</ref> Paper, invented in the 1st century BCE, became standard by the 3rd century CE, along with the use of red or vermillion seals.<ref>Gallery labels, Royal Ontario Museum.[https://www.flickr.com/photos/toranosuke/48532570997/sizes/l/]</ref>

Imperial seals were exclusively made of precious materials such as [[gold]] and [[jade]] beginning in the [[Qin Dynasty]].<ref>Gallery labels, British Museum.[https://www.flickr.com/photos/toranosuke/33763474828/in/photostream/]</ref>

Imperial seals were exclusively made of precious materials such as [[gold]] and [[jade]] beginning in the [[Qin Dynasty]].<ref>Gallery labels, British Museum.[https://www.flickr.com/photos/toranosuke/33763474828/in/photostream/]</ref>