Blue, Calligraphers Black, Brown, Red, Green
Difficult to find this ink. I do not think it is in production anymore. As soon as I can confirm that, I will eliminate this review.
The black is one of the darkest and best flowing ink I have used and works great in just about any pen. The ink is also a good test of being able to store ink. I bought up a case of the black some 15 years ago. I keep the ink in a closed cupboard and to this day it writes just fine.
I regularly get requests as to where you can buy Platignum inks. I am told that Platignum inks in a wide variety of colours are available from Wallacks on Bank Street in Ottawa, Ontario. (Thanks to Alan Bennett for helping with that) and also Robert Antovel of Art & Frame of Sarasota sells the ink in blue and black, bottles and cartridges.