Oooops - thought this looked cool - Iris Black - so picked up a couple of rods and as I go to try it, I realized that it is 96 COE.
I thought I would risk it on the ivory and just keep it to a small amount and see if I could get away with it.
So far - it seems ok. I hit it with a light reduction flame and it brought up a nice metallic sheen, and fumed the ivory.
As I don't stock a lot (any!) 96 COE glass - I thought I would use it by itself in this wavy heart, made on the Sirius system mandrel. Again, a light reduction brings up a nice metallic look.
But anyway - it's a 96 - so the take-away is: read the entire label before buying glass. ;-)