Sakura Fountain Pen Gallery generously sent me Robert Oster Red Clay.
It is an ink in the inkArt.ink line ( http://www.inkartink.com/ ) They are available in 50 and 100 ml and have added UV protection.
Red Clay is a a nice "muted" red. Clay can have a lot of different colors, but this looks for me like the red bricks used for building in the Netherlands.
The ink shows shading and what I particularly like is the dark outline of the letters (see writing and dip pen).
There is some black sheen.
Behavior of the ink is good, like most Robert Oster inks, and especially the use with dip pen and for calligraphy is excellent, as expected for an Art ink
The chromo shows three colors, 2 of them very distinct. Closest thing to the chromo is Shaeffer Skrip Red, but this red is far more brighter.
I like the color and behavior of the ink, not only for art but also for writing.