Bottle and pricingBottle capacity: 66 ml / 2.2 oz
Price / ml: $0.17
Color and saturationPrivate Reserve tries to be cute with the name "Daphne Blue" and I'd say it succeeds because this ink is light blue, bright and cheerful as a warm summer day. You could just as easily call it cerulean/sky blue, or baby blue. Or a light shade of turquoise. It fits all these descriptions.
To get an even better idea, here it is next to two similar inks: J Herbin Diabolo Menthe and Noodler's Navajo Turquoise.
What's immediately obvious from this comparison is that Diabolo Menthe leans towards green, while Navajo Turquoise is a darker shade of turquoise than Daphne Blue.
ShadingWhenever an ink shows color variation I'm a happy camper. Light inks sometimes don't do that, but Daphne Blue shades nicely. Of course, the broad nib brings this better into perspective.
FeatheringI haven't noticed any.
BleedthroughNo, although a broad nib on cheap, spongy paper tends to at least produce some ghosting. Luckily this is pretty well controlled in this case due to the lightness of the ink.
Flow, lubrication, and smoothnessWhile it flows very well in the Kaweco, I noticed a tiny amount of dryness, but it's hard to pinpoint. I could chalk it to "measured flow" and I wouldn't be half wrong. So it flows very satisfactorily and it's smooth to boot.
Drying timeNothing out of the ordinary here. As expected, it takes its sweet time on good paper, up to 30 seconds or so (especially with the broad nib). On cheap paper it dries in a few seconds.
Smearing when dryNone.
Water resistanceWater resistance is exactly as I was expecting, despite knowing nothing about this ink prior to testing it. It's non-existent. You can see from the bottom (copy paper) sample how it reacted to only 30 seconds under water.
ConclusionPrivate Reserve Daphne Blue has all the markings of a great ink, provided you're on board with the baby blue color. It's very well behaved on all fronts, with the exception of water resistance but that wasn't an advertised feature in any case. If you like turquoise inks, there's nothing that would prevent me from recommending it, with the caveat that it might be a bit light for certain uses. Otherwise, a solid ink.
Following are the two samples on photocopy and Clairefontaine 90g paper, respectively.