I think these are a fairly new range from Pelikan. I’m missing 4 samples from the range: Amber, Aquamarine, Garnet and Turmaline (if anyone has some spare samples of those inks – please get in touch). These are quite lovely and respond well to the test. As you can see, all of the tested samples reveal hidden pigments and all react with bleach in a variety of ways from deep ochre golds to white neon. They also write well, with a constant flow through the nib.