What's a collophon?

[Yaakov Asher Sinclair]

I noticed that some portfolios include a collophon (sp?)
What is this?
thanks

[Dan Fromm]

There's only one "l". Look in a dictionary.

[David R Munson]

1. An inscription placed usually at the end of a book, giving facts about its publication.

2. A publisher's emblem or trademark placed usually on the title page of a book.