Those are my swabs of Kingsand and Ochre, which look the same.
Paper towel chromatography confirms it. Conway Stewart Kingsand is on the left and Diamine Ochre is on the right.
Knowing that these two are the same, and looking at Conway Stewart’s 2013 announcement of the inks, probably is enough to identify the other corresponding Diamine inks.
Conway Stewart announced its inks as “Bodmin Jet Black, St. Blazey Classic Red, Kingsand Ochre, Tamar Royal Blue, Tavy Denim and Edgcumbe Lavender.” So just as Kingsand is also Diamine Ochre, I would bet that Bodmin would be Diamine Jet Black, St. Blazey would be Diamine Classic Red, Tamar would be Diamine Royal Blue, Tavy would be Diamine Denim and Edgcumbe would be Diamine Lavender.
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Fountain Pen Follies 