Exploring (long) pip rubber designs
This article applies mostly to long & medium pip rubbers but you can extend the same concepts to short pip rubber. I would classify long & medium pip rubbers into two types :-1. Standard designs (cylindrical pips, nearly flat top).2. Gimmick designs :- Such as pip on top of a pip or slanted pips etc. (Not recommended; many may not be even be ITTF legal) but there are a few that have stood the test of time
Factors involved in understanding Long & medium pip rubbers :-(Assume all other parameters are same while evaluating one specific parameter) .
Examples :- Feint Long (Sorry this is the only rubber I can think of as good for chopping. P-1 Curl, Phantom 011, 012, 007, and 008 come close but are too gimmicky and I prefer a predictable rubber like Feint Long)
If you want to play close to the table block & hit style you want to use medium length pips with smooth top & thick sponge.
Examples :- Screw, 755
If you play an all around style that includes some chopping as well as blocking and even looping & lobbing you may want to use medium-pips but with rough pip top and in between thickness sponge.
Examples :- 638, Yung 639-A, magnitude, Feint (Regular), Juic Leggy
Short pip substitutes :-Following rubbers are not too useful but are better than short pips as secondary rubber
Examples :- PF4-C7, 563, P2 Curl. I have not tested any European brands such as Grass or Donic Zucco etc. Of course stuff like Bamboo slash is illegal I assume. The brands above are best in my opinion in their class. Others are either ineffective and /or are gimmick rubbers and must be avoided.