Hiya guys,
Maybe I can help a little bit.
I have three kinds of hankens for you to look at in my gallery and the word Official is used on all of them.
The first one is:This one is a Printed silk screen like copy of a original hankens, "Official repro cels" and sold as such a few years back by Cellu Club.
http://backlotanimation.rubberslug.com/gallery/master_query.asp?SeriesID=17091
The second one is:This one is a "Official Hand Painted Repro Cels" of hankens that were used for cover items" as sold by the Cellu Club a few years back in limited numbers, And were hand painted just like the Hanken it comes from
http://backlotanimation.rubberslug.com/gallery/master_query.asp?SeriesID=17092
The third one is:This is one used as Hankens on the covers of VHS tapes and pencil boards and posters,These are the real deal I have the covers they were used on.
http://backlotanimation.rubberslug.com/gallery/master_query.asp?SeriesID=17082
Real hankens as a rule are somewhat bigger(monolithic) in size than normal because they shrink them down to the size they need and this makes the drawing more detailed, As the bigger lines are now smaller and closer together and this makes the covers look way more detailed than they are.
Hankens are for the most part one off items but can be used on many things at one time and with many backgrounds.
Yes there are Hankens made of paper I have seen many of them from some of the CG colored shows and can be quite detailed in pencil.
Hanken art may be on the way out as many studios are now going full CG so all the art is on computer and no paper is used,What a loss!
I hope these examples help out some!
Roy