Diplomat Elox Ring Fountain Pen - Black & BlueAbout Diplomat Elox Ring Fountain Pen Black & Blue Thie Diplomat Elox Ring Fountain Pen has been created based on the DNA of the Aero but with a very different and futuristic style. Elox comes from eloxieren which means anodisation in German. The manufacture of this pen includes a unique double anodisation process firstly a full black anodisation followed by a second one in blue to provide the matt and shiny colours. The nib section is also in blue