OOAK Table Tennis Forum

My theory on this is as follows. But I am open minded & willing to correct myself as needed
A pips in (or reverse or inverted) rubber (anti or spinny type) has two components. The rubber & the sponge. Spin can from one or both of these 2 components. If the sponge is softer & lively the dwell time is higher and more spin is generated. I may be wrong but if the sponge is dead it is called a dampening spnge.
But the top sheet for an anti is always dead to some degree depending on the COF (Coefficient of friction) . If the COF is low the top sheet is more dead & if I am not mistaken, is more slick.
So the TOTAL behavior of an anti rubber (or any rubber) is based on a combination behaviors of both the top sheet & sponge (in the case of inverted rubber the illegal boosting but to keep this analysis simpler, let us forget illegal boosting & also the effect of the blade) & one dominates the other & in the case of anti rubbers, the top sheet is more dominant (in other 3 rubber types it is different)

So let us first consider the case #1 :- Here both the top sheet & sponge are totally dead, as in the case of the 50 year old dear racket your grandfather left in the attic of your house for you to be well cooked by the summer heat like in the tropics.
In this case the rubber will not and cannot have any significant spin “reversal” but can only have spin continuation, which is just returning back the incoming top spin as back spin, it will “look” like spin “reversal” depending the on the total effect of blade and the top sheet and the sponge. If the blade has high dwell time it may have little spin “reversal” but otherwise it is mostly spin “continuation”. If the top sheet has higher COF, like older frictioned antis, it may have some spin “reversal” due to top sheet as well.

Let us look at case #2 where the top sheet is still anti but the sponge is more lively as with a spinny inverted rubber. Now the racket will have little more spin “reversal” due to the sponge added.
Now I would like to talk about so called long pips & spinny inverted in comparison but I won’t for now.

I would like you def-attack (or others with robots & I don’t have access to any at the moment) to perform your above tests to study the level of total spin continuation & spin reversal for various old & new antis such as from Butterfly Super Anti against ABS, Gorilla & Barna Gilanti etc . Yours is a visual effect study which is fine but it would be nice if someone like poster Palguay from India here who makes actual RPM (revolutions per second) or RPS measurements to be even more accurate.

Then we can make accurate measurements for various so called long pips & spinny inverted rubbers to compare the total spin continuation & spin reversals for various combinations of top sheets, sponges & blades. Such results may partially answer objectively as to whether an at the table blocker should use anti or so called long pips. Well actually the answer lies is why no chopper uses or has used anti at highest levels but that wouldn’t stop players from blindly choosing what they choose , anti or so called long pips.

Of course I am sure most manufacturers probably make these measurements but won’t release them to the public just as they would not release the other technical details about thing such as pip design parameters & chemical details of material used, I of course do not blame them & it is what it is & they would rather claim that every rubber they release will do a little bit of everything & is the definite & final “holy grail” & solution to all the problems of a poor amateur player.