I have previously posted here about four Kaweco inks that look similar to four corresponding Caran d’Ache inks. Though none is an exact match, they are fairly close in color.
All of the foregoing are current inks. But my friend Chris read that post and had a great idea: she wondered whether Kaweco’s turquoise ink might prove to be close to an older, now discontinued, Caran d’Ache ink — Caribbean Sea.
Here’s some quick history: Caran d’Ache previously offered nine fountain pen inks in the Colors of the Earth collection, including Caribbean Sea. In 2013, Caran d’Ache replaced the Colors of the Earth with a new line of 12 inks called the Chromatics collection.
The turquoise in the Chromatics line is called Hypnotic Turquoise, and it is quite different than the old Caribbean Sea.
But Kaweco Paradise Blue is a more blue-green ink, and so is closer to Caribbean Sea, as Chris noticed.
I happened to have a tiny amount of Caribbean Sea left over. So I bought a bottle of Kaweco Paradise Blue to test the two together. Meanwhile, Chris did the same.
Our conclusion is that Kaweco Paradise Blue and Caran d’Ache Caribbean Sea are very close, though not the same. My sample of Caran d’Ache Caribbean Sea has more blue, and my Kaweco Paradise Blue has more green.
When comparing the two inks, I did some paper towel chromatography. On the left is Caran d’Ache Caribbean Sea. On the right is Kaweco Paradise Blue.
Here are some writing samples, with each ink in a Lamy Safari with medium nib. In each pair of lines, Caribbean Sea is first and Paradise Blue is second.
Here, Caribbean Sea is on the left and Paradise Blue is on the right.
The scribbles have more density, so the color difference may be easier to perceive.
Paradise Blue does have more green in the mixture. But the more you write with the inks, and the more you look at them on the page, the more Paradise Blue seems like a possible replacement. It’s worth testing, at least.
When I tested them, it turned out that I actually preferred Paradise Blue. So I am very glad that Chris had that inspiration.