Welcome back to the Marilyn Darling Show—today I’m doing an ink review of Waterman Serenity Blue, and yes, I’m breaking my usual schedule because the first of the month threw me off. I start with a swatch, then I run my water resistance test (and let me tell you right now: it does not have good water resistance). I would not trust this on the outside of an envelope, because it’s the kind of ink that can wash right away. I also do my toilet paper chromatography with water and rubbing alcohol, and you can clearly see it separate into a light blue and a darker blue in both tests. Then I go through a whole stack of papers—everything from Pen+Gear 32 lb copy paper to Tomoe River—to see how Serenity Blue behaves. On the good papers it looks beautiful, with shading and even some red sheen/haloing showing up on certain pads (and yes, you can really see that sheen on some of them). But on a bunch of everyday papers it feathers like a chicken, and some of them even bleed through. My final takeaway: it’s a pretty medium blue with a teeniest hint of purple, but it writes fairly dry and can dry out in my nib, so I had to use a pen where I could squeeze a little bloop of ink out. Personally, I think it has a little bit too much sheen for me, and I end up preferring another blue in my collection.