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Platinum & Kuretake Fountain Pen Ink Cartridges
Japan's Platinum Pen and Kuretake use the same type of cartridge: tapered in shape, with an above-average capacity and a distinctive ball bearing closure. All Platinum fountain pens and Kuretake cartridge brush pens are compatible with the ink cartridges and converters in this collection.
To install a Platinum format ink cartridge, push the ball bearing end into the pen's feed until you feel the bearing dislodge. This type of cartridge requires more pressure than others during reloading, and you'll notice that the cartridge goes deeper into the pen than other formats. This is all for a reason—Platinum format cartridges fit very snugly and are practically leakproof as a result.
![Platinum - Carbon Ink Cartridges, Box of 4 - St. Louis Art Supply](http://shop.stlartsupply.com/cdn/shop/products/platinum-carbon-ink-carts_540x.jpg?v=1656854912)
![Platinum - Carbon Ink Cartridges, Box of 4 - St. Louis Art Supply](http://shop.stlartsupply.com/cdn/shop/products/platinumcarboninkcartsbeauty_1of1_540x.jpg?v=1656854912)
Platinum
Carbon Ink Cartridges, Box of 4
![Platinum - Fountain Pen Converter 800A - St. Louis Art Supply](http://shop.stlartsupply.com/cdn/shop/products/platinum-converter-gold-pow_20f4cccf-8de2-49ca-b644-8e32c7a829d6_540x.jpg?v=1656855732)
![Platinum - Fountain Pen Converter 800A - St. Louis Art Supply](http://shop.stlartsupply.com/cdn/shop/products/platinumconvertergold_1of1_540x.jpg?v=1656855732)
Platinum
Fountain Pen Converter 800A
![](http://shop.stlartsupply.com/cdn/shop/products/kuretakeink-cafeemptycartridge5pkpow_540x.jpg?v=1670693801)
![ink-café Empty Ink Cartridge Kit](http://shop.stlartsupply.com/cdn/shop/products/kuretakeemptycartridges5pkbeauty-2_540x.jpg?v=1670693801)
Kuretake
ink-café Empty Ink Cartridge Kit
![](http://shop.stlartsupply.com/cdn/shop/products/blue-black-carts-box-of-10-pow_540x.jpg?v=1670705697)
![Blue-Black Iron Gall Ink Cartridges, Box of 10](http://shop.stlartsupply.com/cdn/shop/products/platinumprocyon2022beautybatch1_2919e459-20fe-4bb0-9806-d1a7b96da9cf_540x.jpg?v=1670705697)
Platinum
Blue-Black Iron Gall Ink Cartridges, Box of 10
![](http://shop.stlartsupply.com/cdn/shop/products/black-carts-box-of-10-pow_540x.jpg?v=1670706275)
![Platinum Black Ink Cartridges, Box of 10](http://shop.stlartsupply.com/cdn/shop/products/platinumblackbeauty_fe8b5e43-b3fe-47a0-b905-b7d8274e9999_540x.jpg?v=1670706287)
Platinum
Platinum Black Ink Cartridges, Box of 10
![](http://shop.stlartsupply.com/cdn/shop/products/red-carts-box-of-10-pow_540x.jpg?v=1670706485)
![Platinum Red Ink Cartridges, Box of 10](http://shop.stlartsupply.com/cdn/shop/products/platinumredbeauty_540x.jpg?v=1670706485)
Platinum
Platinum Red Ink Cartridges, Box of 10
![](http://shop.stlartsupply.com/cdn/shop/files/kuretakefountainpenrefillspow_540x.jpg?v=1721788898)
![Ink Refill Pack for Kuretake Cartridge Pens](http://shop.stlartsupply.com/cdn/shop/files/kuretakebrushpenrefillsbeauty_540x.jpg?v=1721788897)
Kuretake
Ink Refill Pack for Kuretake Cartridge Pens