This is a great colour. Somewhat of an outlier in the Deep Dark range from Cult Pens as it is quite a bit brighter than its stablemates. The ink currently functions as both a main and a markup ink. On white paper the ink “pops” nicely. On ivory (e.g. Rhodia Webnotebook) it appears darker but still clearly orange.
One property in which this ink is very much a part of the Deep Dark range is its flow; it’s quite a dry ink and leads to regular hard starts. Leaving a pen uncapped for what feels like a few seconds leads to a stop in flow and not using it for a week or so is just asking for trouble. Starting again takes quite a bit of effort. Thankfully it’s an easy ink to maintain being straightforward to clean.