Gary is a fountain pen enthusiast from southern Japan with a knack for chemistry. A few years ago, he started experimenting with iron gall inks. This eventually led to a collaboration with Platinum, resulting in the Classic Ink series. He has also made inks for Pen Saloon and Wagner.

A few months ago, Gary published a few observations and lessons using iron gall inks in fountain pens, on his Japanese blog. Given his knowledge on the subject, and as iron gall ink safety is a question that often comes up on pen forums, I thought it was worth summarizing his findings in English.