The suggested amount is 10% of the amount of the ink you are adding it to and can be applied to most non-glistening inks regardless of ink brands
Midnight Purple boasts rich
helping wherever her small paws can
Contained in 50ml glass bottles this medium purple fountain pen ink with gold shimmer is categorized as a Chameleon Ink
Based on the shape of a vintage Esterbrook nib from the 1930’s
S.T. Dupont Rollerball Refill - Black (Medium) travelerbrass The suggested amount is 10%S. T. Dupont medium rollerball refills in black or blue. For the following pens: Olympio, Dfi, Libert, No classique large, Classique 2, D. Link Caprice, Fidelio, Ellipsis, Montparnasse, Gatsby, Line D, Mon Dupont by Karl Lagerfeld. Sold individually.