It seems Blackstone inks are a product of FPN - their origin can be traced back to 2013 when some of ink-testers (Amberlea minions) started discussng powdered inks. Soon after many of us had a chance to review / try the original SuSeMai powdered inks. The powders are gone but in the meantime they evolved into Blackstone ink concentrates and recently the line called Colours of Australia was created (based on those concentrates).
Recently new colors were added to Blackstone lineup. Mishka from BureauDirect sent me samples. Thank you
Boronia Brown is least saturated Blackstone ink. It doesn't look bad but it lacks charisma.
Drops of ink on kitchen towel
Oxford, Jinhao 866, medium
Copy paper, Jinhao 866, medium
Midori, Jinhao 866, medium nib