Sailor - Seiboku Ink Cartridges - Blue (12 pack)

Seiboku Ink Cartridges: Blue - The Seiboku pigment-based blue fountain pen ink, available in a pack of 12 standard international cartridges. Seiboku uses Sailor's proprietary ultra-fine pigment particle formula, designed to deliver the smooth, consistent flow of a dye-based ink without the typical drawbacks of pigment inks such as clogging. Depending upon the quality of the paper used, Seiboku offers minimal bleeding and is resistant to show-through, making it suitable for a wide range of uses from illustrating to signing official documents. It is also a favourite amongst artists and sketchers for its water resistance, and is easy to rinse out of your fountain pen.