Adam Santone did a quantitative analysis of 15,000 customer reviews of 500 fountain pen inks sold on the Goulet Pen Company website. Those reviews rated inks by characteristics like drying time, flow, shading and water resistance, and Adam collated those ratings into useful comparative tables. There are some artifacts here and there—I don’t think Iroshizuku Syo-ro is supposed to be water-resistant—and different bottle sizes of the same ink have different entries, because reviews are by the SKU, but this will really help inform my ink buying in the future. [r/fountainpens]