Fountain Pen Ink, 18ml glass bottle. TWSBI 1791 Series ink, limited time only, 6 colors total in the series, This color is part of a 6 pack series we created from a book written in 1791 called "Dream of Red Chambers". It's one of CHina's 4 great classical novels and we picked colors out of the buildings and descriptions within this book for this series of ink.