No, I suppose those are not lithographs. They try to describe them on GAINAX as "high-tech-silk-block-prints".. but what they are referring to is the glicee process. Although the process is similar in that they are "fine art prints", those are glicee's..
I see a lot of this glicee's art coming out especially with USA comic book super hero characters.
Here is an excellent example:
http://shopping.animazing.com/gallery/alex_special.htm
I have never seen any in Japan or with Japanese anime until these Gainax ones "live" though. Glicee's in general are being done both on canvas and paper.
Whether it is just an over-hyped ink-jet printing process is the rage I guess,
[u]debate[/u]:
http://www.usask.ca/lists/alt-photo-process/2003/jun03/0202.htm
I think the prcess to make a lithograph is much more of a creative process, but both do have their "reproductive" qualities. I think that lithographs will vary. This glicee process is done on disk. I guess the 21st century and its digital/technological world of tools, have crept past the creative hand of the man to some degree. I wonder if we will "buy into it", quite literally. When very famous artists and studios begin to produce computer generated or supported artworks, and put 4 figure prices on them, for limited editions of 300?!, it makes me frown. But, at the same time I get curious and want to see one or two, at least before I make a definitive judgement that they are either great or the biggest scam and rip-off since this side of (the moon) anime has begun. I am always on the verge of feeling like the proverbial "sucker born every minute" as it is with collecting cels! =)