I had some fun the other night experimenting with mixing J. Herbin Gris Nuage grey ink with other colors of J. Herbin fountain pen inks. For this test I used the ratio of five parts Gris Nuage and one part the other color of ink. I used a Clairefontaine Basics notebook for the paper, which held up quite well despite being heavily doused with ink.
Gris Nuage plus 1670 Anniversary Rouge Hematite ink turned out to be a toned-down version of red, not as bright as the 1670 ink on its own. Not a dramatic change, but who would want to change this great red color anyway?
When Bleu Pervenche was added to Gris Nuage the result was a turquoise-grey color. Nice shading in this combination.
The big surprise was Bouton D’or turned Gris Nuage into a great army green color with lots of shading. This was my favorite result and I filled up my Pelikano Junior with this color immediately!
Gris Nuage plus Violette Pensee resulted in a dark purple-grey color as expected.
My second favorite result was the Gris Nuage and Rose Cyclamen combination. This turned out to be a satisfying purple color with pink undertones.
Anyone else have a favorite ink mixing combination using J. Herbin Gris Nuage ink?
by 
Now you make me regret not getting Gris Nuage. I was this close to buy it in Paris but changed my idea because I already another grey ink I use for sketching… but this would be great for mixing!
I love gris nuage, and never would have thought of this, but it’s brilliant.
I like Gris Nuage but I find it pale, so I’ve added a little Perle Noire to it. I like your idea of adding the grey to other colors!
Pretty! I used to have Gris Nuage, but found it too light for everyday writing. I never thought to mix it, though. Now, I must buy more.