http://www.ballreviews.com/Forum/Replies.asp?TopicID=229454&ForumID=112&CategoryID=2

Hot off the wires of the top-secret under ground bunker at 900 G,
"the Red/Black is still not a full solid but it’s the closest one to being a solid. The Red is solid and the black does have pearl in it. The other 3 balls have both color mixes pearlized. Again our goal wasn’t to make a different reaction with this one, but rather to add to our color selection."