Beautiful Rusian ink for fountain pens, nostalgic brand from the USSR time "Raduga" ("Rainbow") - 3 bottles 70ml each of 3 colors - black, violet and blue (or if you wish one or two colors). The colors are very beautiful and the ink very stable on paper and dries fast.
Please, remember if you don't plan to use a pen inked with "Raduga" for more than 2 days you need to remove the ink and wash the pen carefullt with warm water. Otherwise it may dry inside the pen which and become difficult to wash away. This ink is recommended for fountain pens with dark color grip section because white or light color grip section can by accident pick the color of ink.