In the Octopus Fluids Classic Collection you will find fountain pen inks in 22 different colours. Each ink has its own recipe. This is because the different high-quality dyes used affect the properties of the ink so differently that perfect flow, shading and drying times can only be achieved by individual adjustments to the formula.
| Classic Collection | Document Inks | Neon Highlighter Collection |
| Pastel Collection | Sheen Collection | Write & Draw Collection |
