Diamine 👍👍👍 are one of the largest independant ink manufacturers and have a wonderful range of inks in a huge assortment of colours. If you can imagine a colour then Diamine will have an ink to match. Check out the Shimmer inks which are very popular at present.
The inks are available in cartridge form as well as bottles which is good news for those people who find cartridges more convenient and easier to use whilst on the move.
They also make Registrars ink, a heavily pigmented permanent ink which is used for signing official documents. If you have a wedding certificate it will have been signed using registrars ink! Be careful if you fancy trying this ink, it will clog your pen up if left for more than a few hours. All of their other inks are perfectly safe for normal use.
Diamine can be found at www.diamineinks.co.uk
Diamine promote and support their products well and the website is easy to use😊. The inks are very fountain pen friendly. They are available online and through various specialist retailers.