Recently I've been looking to save on paper and have had some issues with bleed through with the paper, and I've heard that iron gall inks are pretty good for those kinds of paper. And I've also heard that Diamine registrars ink and Rohrer & Klingner Salix are both pretty popular. But I'd just like to know what Iron Gall ink in general to consider. And of course if they happen to cause noticeable corrosion.