I hope you will forgive me for keeping banging about the confusion while using Atlantique and Méditerranée. I've thought that someone may find it interesting.
Part of the problem is that I have similar pens inked with both inks. Also, I tend to rotate inks in all my daily pens and because I'm a messy person I forget which pen is filled with which ink. In the result, I write a note with Atlantique and wake up next morning discovering Méditerranée on paper.
I decided to investigated the issue and share some thoughts.
The letters and the second row samples are 12 hours older than the first row fresh swatches (2-3 minutes old). The inks haven't dried properly yet. You can see from the picture that guessing whether a sample is freshly written with Méditerranée or Atlantique can be tricky.
After 4-5 minutes inks are dry but still there is a huge difference in colours of the Méditerranée swatches. Several days ago I undertook some additional observations and the ink takes approximately about 10-15 minutes to darken and to reach final colour maturity. Atlantique stays relatively unchanged.
Azure is also interesting. With time it develops a dusty appearance and in this respect it reminds me Pelikan Royal Blue.
The close-up of Méditerranée: after 5 minutes and 12 hours, respectively.
Another close-up: after around 5 minutes and 12 hours.
The colour shift isn't an uncommon phenomenon. However, apart from iron gall inks, colours seem to settle when inks settle dry on paper. In the case of Méditerranée the time extends to over 12 minutes which I find rather fascinating. Also, most inks tend to lighten up rather than getting darker with time. I wish Didier never changes the formulation. I absolutely love this ink.
Edit: Follow up: After 3 hours the fresh sample is now even darker than the older one (possibly a bit more ink was laid).
Edited by birchtine, 21 July 2017 - 21:41.