Got this article for making India Ink safe for fountain pen. Is this workable ?
Quote: "We know that India Ink can get stale. It still looks black and liquid, but it clogs our pens. We blame our pens, change the nibs, but the problem remains. I guessed that the shellac was forming particles, too small to see, but still enough to clog a pen. A little bit of methyl hydrate added to the ink revitalized it, and it would flow. In fact, I found that I could even put India Ink in a regular fountain pen if I thinned the ink with methyl hydrate."