Blue Velvet was one of the Mystery Ink Number 10 inks. Blue Velvet is a beautiful, striking blue, and bright.
Shimmertastic Blue Pearl also is striking, reminding me of Parker Penman Sapphire, with the shimmer of silver particles. But I think that the silver gives it depth and richness rather than added brightness.
Here are swabs, with Blue Velvet on top and Blue Pearl underneath.
Here is a paper towel chromatography comparison, with Blue Velvet on the left and Blue Pearl on the right.
The different blues that I see in Blue Velvet all appear in Blue Pearl, as does the same pink and the grayish blue at the bottom. But Blue Pearl is more complex: it has silver particles in the grayish blue area, and adds the purple area.
Because I’ve used Blue Velvet, and all the MI-10 volunteers did as well, I can say with confidence that Blue Velvet is not particularly hard to clean out of a pen, though it takes longer than some other blues. I hope that augurs well for Blue Pearl. I haven’t yet been willing to empty my Blue Pearl pen.