Emerald of Chivor 
J.Herbin,  1670 anniversary ink

     The colour range and shading are the qualities of this ink that I find appealing. My use habits are roughly 50/50 drawing to writing on a daily basis and would much rather reach for a black, brown, or red shade of ink over blue. My conflict in general is that I like the way blue ink looks but not for sketching or drawing. Regardless, I will endeavor to give fair opinions when it comes to blue inks.

Emerald of Chivor on test plate after 3 mL of water

     Emerald of Chivor is a green/blue colour that has a red sheen with gold sediment, this spectrum of colour in an ink is truly amazing. The gold sediment however is a good and bad thing. In my demonstrator pens and ink windows I observed the gold collecting in areas that could only be cleaned out by dismantling the pen. For me, this is an issue for pens or nib assemblies that cannot be broken down and limited the number of pens I felt comfortable using the ink in. The ink does take quite a lot of flushing to clean out of pens and I found it a chore. Apart from that the ink performed well, I experienced bleed through and feathering with the flex pen dumping ink on cheap paper. On papers suited for fountain pens the ink performed well as expected. I was pleasantly surprised by how fast Emerald of Chivor dried on both papers tested considering the wet nature of the ink.
      This J. Herbin anniversary ink has an intriguing colour spectrum and performs well, I personally use Emerald of Chivor in the pens that can be easily cleaned and would recommend it with that caveat.

Emerald of Chivor on Hilroy Paper

Emerald of Chivor on Clairefontaine Paper

Ink diagrams prepared using:
1.  Noodler's Ahab fitted with flex 'modified' nib
2.  Noodler's Creeper fitted with Waterman No.2 ideal 14k fine nib