Black rubber sheet is so much better than Red?

I found my red rubbers all les durable because i think they are more difficult to clean

I would agree with u guys, but only on Chinese rubber. My red Sriver that I ve kept for almost 2 years, still has some gripness on it, and I just recently applied EE2 on it, see if the rubber can revive.

I had always thought that the black was simply softer than the red, so it was less grippy because of mechanical reasons.  I have never noticed that it was harder to keep a red side clean as compared to a black side.  What are you cleaning with? 

a leather chamois and typical TT foam cleaner here.

The red dye they use alters the properties slightly, hence the reduced tackiness.

Provincial for a reason.

chinese red rubbers are faster and harder than black ones but are less tacky

There is a scientific reason that deals with the manufacturing process that makes the black more tacky than the red. I can't remember exactly but I think it was to deal with the about of phosphorus in the red rubber that keeps the tackiness level down a bit. The chemical composition of black vs red rubbers are different due to the color. That makes the difference. It could possibly be countered through a better manufacturing process, still the rubbers are not exactly the same so there will always be a little difference between any 2 tacky sheets. Euro rubbers don't count because they are not manufactured to be tacky.

The black mambo (not grippy at all) is much better than the red one.. like one out of three red ones click, but all the black has a huge click.. Same goes with the samba..