Sailor - Souboku Ink Cartridges - Blue-Black (12 pack)

Souboku Ink Cartridges: Blue-Black - The Souboku pigment-based blue-black fountain pen ink, available in a pack of 12 standard international cartridges. Souboku 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, Souboku 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.