I recently started offering fountain-pen-friendly index cards made from the Manila File paper brand. There doesn't seem to be a review of Manila File paper on the site, so I wrote one up on my blog: http://notebookish.blogspot.com/2014/08/manila-file-paper-review.html I reviewed both the cardstock which I use for index cards, and the regular text-weight paper which I don't use but which might be of interest to others. I prefer the regular text-weight paper to other "printer papers" I've tried, such as HP 32LB. It is wet-writing (and therefore has a long dry-time) but there is no bleed-through, loss of shading, or spread. There is some show-through, though, but it is tolerable: