Chesterfield is a now discontinued line of inks. It belongs to xFountainpens and that company is now no longer in operation. That being said Antique Copper is a good shading brown ink. It’s a bright ink, not quite corporate enough to fly under the radar. It goes from an almost orange-brown to a strong reddish-brown.
My thanks to Marty for the ink sample. Chesterfield Emerald is a strong and saturated green ink that’s a good shader. It goes from a saturated dark green to a pale light green. Personally, this kind of green doesn’t really do it for me. I prefer my greens to be in the yellow-green range. That’s
Note: I’ve changed the water test to the bottom of the review. Saves some paper. My thanks to Marty for the ink samples!Chesterfield is an American brand of ink made by either Private Reserve or Diamine. It’s not a super well known or popular ink. There is no real consensus though more lean towards Diamine.