@Philippe
I've not used Koh-I-Noor ink before so I can't say for sure. But if it works fine, it works fine. Look for crusty ink particles around the bottle opening. If there are solid particulars, the ink is not safe for use inside pens or brush pens.
@Philippe
I've not used Koh-I-Noor ink before so I can't say for sure. But if it works fine, it works fine. Look for crusty ink particles around the bottle opening. If there are solid particulars, the ink is not safe for use inside pens or brush pens.