Am new to these forums so Hi All! Lol Ok so my question is can al fountain pens use inks that are of different brands? I have three fountain pens, one sheaffer dunno whatmodel haha, i'll let u guys identify it later, sheaffer ferrari 100 and a parker sonnet red. I've always used their respective brand inks but i do use parker's quink with my sheaffers. The question stems from those namiki-pilot inks, are they usable with my pens? Or do i need to go buy a namiki one just to be safe that the inks wont ruin my pens? (on pen boutique it states that the inks were made for namiki/pilot pens - and so my question arose haha). Ty all