What Is ISO Standard Ink | Permanent Ink Put To The test

Fountain Pen users use inks which claim properties such as waterproof, permanent and bulletproof, but for most inks, there is no accreditation to accompany these claims. Sure you can spill water on the ink to find out, but some ink makers go above and beyond to get certification that their ink can withstand attach, not only from water, but from acid and bases. This is my video where I get my head around the ISO standard for ink (ISO Standard 14145-2) and see if these inks are any good.

Видео What Is ISO Standard Ink | Permanent Ink Put To The test канала JPL