I've mixed a bunch of them - I use 2 tablespoons of clear to 1/8th teaspoon of the pearl EX color. Only had one problem child but I listed that with the color below. If you have the 32 color pack I'd order a bunch of clear you're gonna need it.
Jacquard Pearl EX kit - Series 2

Jacquards Pearl EX blue russett

Jacquard EX Solar Gold

Jacquard EX misty lavendar

Jacquards Pearl EX flamingo pink - this was a tough one it was really clumpy, I'm going to put more clear in to see if it helps but you can at least see the color

Jacquard EX voilet brass

Jacquard EX antique silver

If you have any more questions let me know and I'll try and help you out.