ONLINE Black Standard Ink Cartridges – 6 Pack for Fountain Pens & Rollerballs

tandard Black Ink Cartridges are compatible with ONLINE fountain pens and most standard international fountain pens and ink cartridge rollerballs. The deep black ink delivers clear, bold lines ideal for school, office, or personal writing.

Each pack contains 6 standard ink cartridges that are easy to install and provide consistent writing quality from first stroke to last.

✅ Features

• Color: Deep Black
• Pack Size: 6 cartridges
• Standard international size
• Smooth and consistent ink flow
• Strong color intensity
• Non-erasable permanent ink
• Pre-tested quality checked
• Suitable for fountain pens and ink cartridge rollerballs
• Made in Europe
• Lightweight and portable packaging

✍️ Usage

1. Unscrew the fountain pen barrel.
2. Remove the empty cartridge (if applicable).
3. Insert the new ink cartridge firmly into the grip section.
4. Gently press until you feel it puncture and lock into place.
5. Reassemble the pen.
6. Allow a few seconds for ink to flow to the nib before writing.

🔧 Fixing / Installation Method

• Ensure the cartridge is inserted straight.
• Apply gentle pressure until the seal is pierced.
• If ink does not flow immediately, lightly squeeze the cartridge once.
• Keep the pen nib facing downward for a few moments to start ink flow.