Midori Traveler's Notebook
Refill 002 - Grid (Passport Size)
Japanese Fountain Pen Friendly paper that is pretty thin and easy to get more of.
Rhodia No. 16 Notepad
A5 - 5.875 x 8.25, Dot Pad - Black
Rhodia Paper seems to be the standard paper for Ink Reviews, so of course I added this as a point of reference
Tomoe River Paper Pad
Where to Buy:
Paper for Fountain Pens
Nanmi Paper
Another Japanese paper. If I understand correctly this paper was created for Catalog Mailings. It is extremely thin, almost transparent and yet has no bleed through onto the next sheet except for the most ill behaved inks, or extreme nib situations. For example I am sure you can cause bleed through with a flex nib. I do not normally flex write, so this is an amazing paper to me. I use CREAM colored for this, so that its easier to see what is Tomoe River and what is Rhodia DotPad when I scan the back sides.
M by Staples
Where to Buy:
Staples
The Staples edition of Disc Bound Notebooks. Much like Levengar Circa Notebooks, but the paper even easier to get. Staples is such a known brand and the refills are so inexpensive that you may be able to request it from your office manager at work without hassle or questioning. To be honest this is the only paper I found in USA office supply stores that is really fountain pen friendly. Cost wise it is not much more then binder filler paper. I highly recommend the whole system to a student who wishes to use Fountain Pens.