is there a Japanese to Euro conversion chart for rubber hardness?

[FrenchFrog33]

I have a difficult time understanding the rubber hardness of Butterfly rubbers. Is there a conversion chart? Or can someone break down the rubber hardness of some of the popular Butterfly rubbers?

 

[ricospin]

Correct me if I’m wrong but I think it’s been said before that Butterfly uses DHS scale.

 

[lodro]

DIGNICS 05
I am surprised

Sponge hardness	40

 

[TensorBackhand]

Correct me if I’m wrong but I think it’s been said before that Butterfly uses DHS scale.

No that doesnt make sense to me. Dignics is 40 hardness, but that would be 50 ESN i think.

H3 40d would be like 55d esn i think.

 

[lodro]

No that doesnt make sense to me. Dignics is 40 hardness, but that would be 50 ESN i think.

H3 40d would be like 55d esn i think.

Yes, that sounds correct to me.
I have very limited insight into the "rubber-world" but could not help thinking that with both Tenergy and Dignics Butterfly always kept adding a hard version and the Chinese went the other way by boosting the living Bejeises out of their bricks to make them softer 😂

 

[thomas.pong]

Roughly add 10 to get the Euro scale (give or take 1 degree)

 

[Tiz]

 

[igorponger]

Yeah, we have got a convincing proof by making tests on a variety of rubbers. Shore O would be always correlated to Shore A + 10 on average.
Japanese as well as Chinese manufactories using Shore A scale, while ESN using Shore O.

 

[docbroke]

Replying to an old thread, but I think this may be useful.
Convert between shore A and shore O hardness
Chinese/Japanese = Shore A
ESN = Shore O

 

[igorponger]

FOAMED PLASTICS REJECTED BY ITTF. .

Yes, you're free to make your own experiments with whichever type of materials that comply with ITTF standards.
Be aware please, --The sponge materials being found on market as separate sheets are not a subject to ITTF control, and thus forbidden for competitive play.

Foamed plastics, e. g. EVA sheets, is a novelty material generally adapted to absorb energy from the ball on impact. EVA is not allowed in the sport due to the inelastic "pockmarks" on rubber surface resulting from the ball bounce. Be alert about using EVA products for competitions.

Instead, give a try to the newly developed black dampening material of German origin. Not sure about the legality of this substance, yet. 🤔

https://www.aliexpress.com/item/1005007642687349.html

 

[Tyce]

To answer the question, yes, there are tons of conversion charts.

..they're all different, and they're all rubbish.