<a href=showthread.php?s=&postid=8704682#post8704682 target=_blank>Originally posted</a> by thriceanangel
I have brought this up in another forum. You could test them by using a protein based ink. and timing the amount of time until you get a certain amount of ink out. You'd have to use RO/DI of course because the ink would have to be the only impurity other than the salt. Don't konw if they'd have to be "cured" skimmers or not, but I think that it'd work