Had an opportunity to check out the Optilux ink by ICC at the ISS Columbus.
http://www.iccink.com/optilux/505.htmIt looks good and even though it was hard to judge on location, it seems pretty reflective. Not sure if it is twice as good as anything else, but it certainly works.
The main point is that it will print through a 230 screen and you can do some very slight adjustments to the color. This lends itself to using it in the simulated process designs as metallic silver or gray. Keith (from ICC) had a sim process shirt printed with three different gray/silver reflective inks. It was a very nice print with an added bonus of being reflective.
The ink was pretty thin (it was actually a little to thin) and was very easy to print. Nice and soft hand. Little grainy, but nice thin and flexible.
Now the bad parts, high price and very short shelf life. Over $50 for a quart and I think he said over $150 for the gallon. It is a two part system and you have to mix in the coupler (like diazo/dual cure emulsion) and once you do, the shelf life is 8-12 hours! So better mix only what you are going to use!
I'll post some pix when I take them.
pierre