OOAK Table Tennis Forum

I am sort of baffling about total maximum permitted sponge thickness. I checked ITTF site.
The rule only says the total thickness of rubber ( I think this meant cover sheet plus sponge) is 4 mm max allowed.

I do not know how I am interpret because it is confuses. It top cover maxim is 2 mm, is that mean that the sponge can no more than 2 mm maximum ? But I know many sponge easily 2.2 mm.

I asks because if I use short pimpled cover sheet which is only about 1.5 mm, then I can use 2.5 mm for sponge then (total 4 makes me legal) ? yes ?

Also I have seem many reverse rubber with thin top cover, maybe only 1.3 total from bottom pimple to top of smoothy side. then it allows for 2.7 sponge ? Yes ?

I know they want to minus for glue which may be 0.1 mm to 0.2 mm but that is different.

I also don't understand how they can tested for a rubber to be sure it is less than 4 mm. I see some net height tooling uses with a notch on it but I want to knows how they verifies this in big big tournaments. They use microscope (or like tool) ?

GOONEY.

There are no restrictions on sponge thickness in the writen Laws.

Some reckless manufacturers took dare for a thick sandwich of 4. 0 millimeters. Haifu Dolpnin, for example. Gooney, triple gooney Manufacturer, indeed. .

The total thickness can be no more than 4mm, so if your topsheet is only 1.5mm, then the sponge can indeed be 2.5mm. There are some rubber with very thin topsheet, that in turn have quite a thick sponges for Max thickness.
Referees at tournaments only measure the total thickness from the topsheet surface to the wood surface, so as long as it's 4mm or less, it's fine.

A glue sheet or glue layer would need to be subtracted from the maximum allowed thickness.

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Give some flashy colours to your speach.

igorponger wrote:


Except of course if the player has sanded the blade underneath the rubber so that the thickness gauge is rendered fairly useless, as was shown in a recent ITTF Equipment webinar.

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Moderator, Inverted Retriever Technique sub-forum - http://ooakforum.com/viewforum.php?f=74

I think it's pretty clearly explained. If you use plain rubber (e.g. short pimples 0X), the maximum allowed thickness is 2mm. If you use sandwich rubber (topsheet + sponge), the maximum total thickness is 4mm. That being said, most people on here are amateurs and it's unlikely they will ever be checked.

Which is why, if I were one of these fly-by-night Chinese manufacturers (e.g. Boer, or Timo Boll) I'd make some 4.5 or 5mm sheets - they're not ITTF approved (though there's no reason NOT to put a fake ITTF stamp and number on the rubber..) and once the word gets out there'd be a stampede of Chinese casual players trying to buy them, once they figure out how much extra spin and speed you can get out of them.

There was a similar situation in golf - someone was making "cheater balls" which would fly further than what was legally allowed. I think you can still get the things. For a little extra they could even put fake markings on them.

Iskandar

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ACCORDING to ITTF statistitians 20 Millions people now engaged in competitive play, under the ITTF rules. The Rules explicitly REQUIRE all the rubbers to be of no more than 4 millimetres thick. All of the 20 Millions are BOUND to go by the Rules. No one is excused from the table tennis Laws. ALL PLAYERS must be checked for actual rubber thickness.
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Absolutely for sure.

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Iskandar

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