Platinum Blue-Black fountain pen ink is a rich shade of blue-black that leans towards blue. The cardboard box contains 10 proprietary ink cartridges that will only fit Platinum fountain pens that accept cartridges.
 
Platinum Black fountain pen ink is a deep shade of black. The cardboard box contains 10 proprietary ink cartridges that will only fit Platinum fountain pens that accept cartridges.
 
Platinum Converter fits all Platinum Pens from Japan.  Ink converter for your Platinum pens! Choose from silver or gold accented ink converters to go with any of Platinum's cartridge/converter pens.
Equipped with 0.61ml ink capacity.Specifications- Type: Ink Converter- Capacity: 0.61 ml- Compatible With: Platinum converter/cartridge fountain pens
 
Platinum ink is made in Japan and is very popular for its consistent performance.