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Where is your proof? You are just repeating BS you have heard from other players.softer rubbers generate way less spin,
BTW, my Rakza 7 Max soft is very spinny with the right strokes.
Who's definition? Why can't a soft rubber be covered with a tacky top sheet?so definition wise, it can't be grippier if reduces in spin rotation, correct?
You are only spreading misinformation. What out. Biden's ministry of truth will get you.
Lodro is closer to the truth when he mentions that it is the person that makes the spin with the right stroke.
The truth is that normal inverted rubbers have a pretty high coefficient of friction so they will stop any slipping or spinning of the ball relative to the top sheet almost instantly as in microseconds. My high speed camera detects NO slipping but it only used a 2000 fps rate so the ball could slip for a few microseconds and not be detected.
The rotation of the ball, assuming top spin, and the tangential impact of the paddle stretches the top sheet a bit.
It is the snapping back of the top sheet that adds extra tangential torque ( spin ) to the ball. If the ball leaves the top sheet because the stroke is too fast then some of this "snap back" torque will be lost. So what optimizes the stretching of the top sheet and the ability of it to return it's energy back to the ball.
Again, the Chinese call a loop a "pull ball" or ,La Qiu in pinyin. This is pronounced la cho. The idea is to have the feeling of dragging the ball with the top sheet forward and above the net. Hitting the ball makes the ball leave the paddle too soon. However Chinese sponges aren't that springy. They are very dense or heavy. Tit is mostly the skill of the player that allows them to apply more torque/spin to the ball.
One thing I would do test different rubbers it to take some of the scraps after cutting, remove the sponge and see how springy the top sheet is alone. I would also do the same thing with the sponge attached. If the sponge doesn't stretch then the top sheet will not stretch much except for what is allowed by the pips.
If I were designing TT rubbers and I wanted the sponge to be light and springy, it would find a way to make the air/gas pockets as big but consistent as possible. Air or gas is very good at returning energy. I would make he top sheets springy too so the ball could stretch across the rubber. I would make the pips longer because this would allow the stop sheet to stretch across the surface. However, there would be a trade off because making the pips longer would mean the base of the top sheet thinner and perhaps not as durable.
I just wasted 20 minutes of my time.