Do $2 fountain pens really have iridium tips? Iridium is expensive and fairly scarce, so it is unlikely it is truly iridium tipped.
I really want a fancy nib – are there any 22 karat gold nibs I can buy? Sailor makes 21 karat gold nibs, and they are on the firm side. 22 karat pure gold nibs do not exist, but you can find 22 karat gold plated nibs.
Can I filter my mouldy ink and use it? This will not help, as the biostatic agents in the ink have likely expired. It’s best to discard mouldy ink and not put it in your fountain pens!
What does 750 on my nib mean? Last week, we answered this question with regards to 585 on a nib, so this makes sense to follow with! This is the gold content of your nib – it is 75.0 % gold, which translates to 18 karat gold. An 18 karat gold nib is not “pure” gold, which would be 24 karats, and too soft for a nib.
What does 585 on my nib mean? This is the gold content of your nib – it is 58.5 % gold, which translates to 14 karat gold. The 14 karat gold is not “pure” gold, which would be 24 karats, and too soft for a nib.