Diamine, a renowned ink manufacturer, has been producing ink since 1864, making it one of the last surviving ink manufacturers in the UK. In 1925, the company established a cutting-edge production facility in Liverpool, and despite changes in ownership, it has remained in the same location ever since. Throughout its history, Diamine has preserved its trademark and traditional production methods. Today, in the 21st century, Diamine's fountain pen ink continues to be the preferred choice for many pen enthusiasts. 

Diamine ink, a water-based ink suitable for any fountain pen brand, stands out for its non-toxic composition. It boasts perhaps the most extensive range of high-quality fountain pen ink colours globally, spanning both traditional and contemporary shades.

By incorporating a confidential ingredient to alleviate surface tension, Diamine achieves vibrant colours with a smooth, free-flowing consistency on paper. Importantly, this formulation ensures that the ink will not cause clogs in your pen.

Diamine Classic Red is a standard, classic red fountain pen ink with low shading. It dries in 30 seconds in a medium nib on Rhodia and has an average flow.