OOAK Table Tennis Forum

I'd just like to give a BIG thank you to Silver and Beer Belly, who have generously sent me some rubbers and cutoff to add to the sponge hardness table! All measurements have been added.

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OOAK Table Tennis Shop | Re-Impact Blades | Butterfly Table Tennis bats
Setup1: Re-Impact Smart, Viper OX, Victas VS 401 Setup2: Re-Impact Barath, Dtecs OX, TSP Triple Spin Chop 1.0mm Setup3: Re-Impact Dark Knight, Hellfire OX, 999 Turbo
Recent Articles: Butterfly Tenergy Alternatives | Tenergy Rubbers Compared | Re-Impact User Guide

Why would anyone keep the cutoffs of their rubbers around???

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Galaxy K-4/ Xiom Vega Pro/ Xiom Vega Pro

Waiting for Alex to ask for them, of course!

I have several cutoffs of rubbers that I have used over the last couple of months -- and would already have sent them if the postage to Australia wouldn't exceed their value to your table.

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Currently playing classic defensive style (a la Chtchetinine)
American Hinoki Single Ply 9mm Bald Cypress
Palio CJ8000/1.2mm Dawei Butter
Saviga V 0.6

I used to do this as well for all the bats I make up for other people...just in case I ever wanted to check out the rubber again... ended up taking a little too much space

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OOAK Table Tennis Shop | Re-Impact Blades | Butterfly Table Tennis bats
Setup1: Re-Impact Smart, Viper OX, Victas VS 401 Setup2: Re-Impact Barath, Dtecs OX, TSP Triple Spin Chop 1.0mm Setup3: Re-Impact Dark Knight, Hellfire OX, 999 Turbo
Recent Articles: Butterfly Tenergy Alternatives | Tenergy Rubbers Compared | Re-Impact User Guide

Hi, Alex
Would you like me to post this billboard on MyTT and some other forums?
A lot of new rubbers did come out by now onto market, we certainly need to go on with our hardness tests, I believe.

Ever Yours
Igor Novick, civil building engineer

For what it's worth I have a big pile of cutoffs I've been meaning to send to Haggis - somehow it doesn't seem as important as it did three years ago.. Mainly cheap stuff but also a half dozen odd sheets of ESN and Japanese..

Iskandar

Durometer hardness, the values attained with one durometer type should never be correlated to those attained with another durometer type!


Hi, Alex

My highest recommendation is that you have obtained Shore A device (now available from many AliExpress stores). The reason is that most of rubber makers, all China's included, would employ this Shore A scale for their rubber hardness evaluations.
Yes. You might give a try to Shore OO device as well, seeing it only needs low-pressure force of 200 gramme uploaded, whereas Shore A needs pressure of 1000 grammes. Be aware here, Shore OO will give you rather puffed dial indication, say Tenergy05 sponge Shore A 36* is indicated Shore OO 75-80 units.
Alex,
It looks like you don't maintain the Hardness Sheet any longer. I can't see any more updates in the Sheet since the year 2012. Bad news. indeed. You should go on, I believe. It is a job worthwhile, anyway.

Bye Bye. Till next.

The trouble is, if I change durometers, the readings are more going to be comparable to the old readings.
There never appeared to be much interest in these readings anyway, and people often questioned the values as they were not comparable to manufacturer specs, so I stopped collecting them.

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OOAK Table Tennis Shop | Re-Impact Blades | Butterfly Table Tennis bats
Setup1: Re-Impact Smart, Viper OX, Victas VS 401 Setup2: Re-Impact Barath, Dtecs OX, TSP Triple Spin Chop 1.0mm Setup3: Re-Impact Dark Knight, Hellfire OX, 999 Turbo
Recent Articles: Butterfly Tenergy Alternatives | Tenergy Rubbers Compared | Re-Impact User Guide

So taking sponge hardness readings has stopped being a shore thing.

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Retriever (sometimes golden, but often leaden)
Moderator, Inverted Retriever Technique sub-forum - http://ooakforum.com/viewforum.php?f=74

That's indeed very encouraging igorponger, thank you!

I will start collecting new values again.

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OOAK Table Tennis Shop | Re-Impact Blades | Butterfly Table Tennis bats
Setup1: Re-Impact Smart, Viper OX, Victas VS 401 Setup2: Re-Impact Barath, Dtecs OX, TSP Triple Spin Chop 1.0mm Setup3: Re-Impact Dark Knight, Hellfire OX, 999 Turbo
Recent Articles: Butterfly Tenergy Alternatives | Tenergy Rubbers Compared | Re-Impact User Guide

I've updated the table, added some values, and also included a copy of the chart that igorponger posted above (thanks igorponger!).

You can see the table updated Sponge Hardness Table here.

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OOAK Table Tennis Shop | Re-Impact Blades | Butterfly Table Tennis bats
Setup1: Re-Impact Smart, Viper OX, Victas VS 401 Setup2: Re-Impact Barath, Dtecs OX, TSP Triple Spin Chop 1.0mm Setup3: Re-Impact Dark Knight, Hellfire OX, 999 Turbo
Recent Articles: Butterfly Tenergy Alternatives | Tenergy Rubbers Compared | Re-Impact User Guide

: : : SHORE DUROMETERs AS NOW USED IN RUBBER MAKING INDUSTRY : : :

Shore A (truncated cone indentor) inbuilt spring force 0.82 kgf


Shore D (conical indentor) inbuilt spring force 4.45 kgf


Shore O (semispherical indentor) inbuilt spring force 0.82 kgf


Shore C (truncated cone) spring force 4.45 kgf
(image same as Shore A)

AN INTERESTED VIEW INTO BEHIND THE SCENES.
ESN factory testing laboratory is now using Shore O digital tester as can be seen from the video. None of the world's major table tennis company does employ this marginal Shore O version. ESN is apparently the only one to use Shore O scale. This is some unhappy inconsistency of the testing methodology, very hard to justify from a scientist's viewpoint, indeed.

https://youtu.be/vdhGxd-oxas?t=108



As an example, ANDRO GmbH is always using Shore A scale for marking on their own rubber products, and DHS rubber manufactore is doing likewise.
Rasanter 37*
Rasanter 42*
Rasanter 47*
Rasanter 50*

https://www.youtube.com/watch?v=oeQtqhVr-Hw

NOTE OF SPECIAL INTEREST: HaggisV, he has been testing rubber samples with the Shore O scale invariably, this is the reason that the numbers in the OOAK Hardness Sheet may differ somewhat from those in TT-Catalogues and rubber covers.
Again, do mind of the fact that Shore O is a durometer very rarely used by the major rubber makers (ESN is maybe a sole exception ). Shore A is a general standard scale.

Merry Christmass and Happy NewYear.

????

1) That video is OLD... "Published on Feb 13, 2013" Even if that durometer you see is a Shore O, a) they might've stopped using it and b) it might be for internal use only.

2) Every ESN made sheet I've ever come across uses the same hardness scale, so I don't see why you'd say ESN uses a different scale than Andro does. They certainly don't publish any Shore O values.

Iskandar