Handmade, water-based, permanent and waterproof pigment inks fordip pens only. DO NOT USE THIS INK IN FOUNTAIN PENS! The line was carefully designed in cooperation with Polish popular calligraphers to make calligraphy writing more enjoyable and easy. Specially formulated for: No feathering effects using a wide range of papers, especially copy papers so that you can print calligraphy exercises, lines etc. Proper flow from dip nibs, especially flex and pointed ones, which means, that one dip is enough for few lines of writing, not just few letters Possibility to write a very thin hairline using pointed nibs One of the the most impressive features hard to find elsewhere: the stable mixture of gold or silver particles that dont sediment – don\’t have to be shaken or mixed during use. Permanent bonding to the paper, crucial for artistic use.