My partner has access to a chemistry lab and there she could easily test my inks for their pH levels. Sometimes I hear discussions about this or that ink pH. Is it something anybody's really interested in? Because, for example, my partner tells me she'd require less than 1 ml of ink to test it for its pH level, so I could give her samples of the half-a-dozen inks I have without shedding a tear, and I could share the knowledge here (and whenever I buy and test more ink). But I'd like to know if there's a demand for this kind of information. After all, I'd be spending my ink and her time on this.