Now I completely understand the love of this ink and the reason it is so popular. The sheen is absolutely powerful, pronounced and gorgeous. The above example was written with an Edison M steel nib on Tomoe River Paper. Look at all the sheen with a M nib.
Ok, so it is odd that the sample didn't produce any sheen for me but the bottle does. Can you get a dud sample? Seems rather unlikely. This Cerulean blue ink is a wonderful ink. It shades, sheens, has nice flow and is a must own ink, in my opinion.
This post is based off of personal experience and opinion. I do not represent Robert Oster in any fashion nor am I being compensated in any way.