Boosting increases weight?

[riemsesy]

Because my rubber wore out, I found a second-hand rubber in my drawer. You know, among this heap of blades and rubbers that have been victimized because of my EJ-ing addiction.

I measured the rubber and realized it was probably from a blade with different dimensions. It was a bit short at the tip and had some overhang at the wings.

So, I thought, let’s boost it so it grows and fits the blade.

And it worked! It now reaches the tip of the blade, with even more overhang at the base.

So, I cut the overhang off.

That made me think… just a random brain fart. When boosting a rubber, we add a substance that makes the rubber heavier but also increases its size.

What will the net weight difference be between normal rubbers and boosted rubbers? Are boosted rubbers really heavier?

 

[dingyibvs]

Because my rubber wore out, I found a second-hand rubber in my drawer. You know, among this heap of blades and rubbers that have been victimized because of my EJ-ing addiction.

I measured the rubber and realized it was probably from a blade with different dimensions. It was a bit short at the tip and had some overhang at the wings.

So, I thought, let’s boost it so it grows and fits the blade.

And it worked! It now reaches the tip of the blade, with even more overhang at the base.

So, I cut the overhang off.

That made me think… just a random brain fart. When boosting a rubber, we add a substance that makes the rubber heavier but also increases its size.

What will the net weight difference be between normal rubbers and boosted rubbers? Are boosted rubbers really heavier?

Yes, they're typically heavier even after cutting off the overhang, but not by that much.

 

[Conehead]

Are boosted rubbers really heavier?

Yes

I boosted a 157 x 150 mm sized rubber 3x with very thin layers of Haifu National White and the weight increase was 4 g.

 

[mcfly]

this is your answer

 

[riemsesy]

Zero … thanx!

 

[piligrim]

Zero … thanx!

Not zero. He mean you should use scale ))

 

[SFF_lib]

Yes depending on the glue (high,medium and low density) that you use with booster, in general every glue+booster = 1g

 

[riemsesy]

Not zero. He mean you should use scale ))

That is a picture from a scale with zero weight.

But maybe I am joking 😉

 

[riemsesy]

Yes depending on the glue (high,medium and low density) that you use with booster, in general every glue+booster = 1g

Yes. But it’s about the difference. And the surface is the same so the weight of the glue on both boosted and non-boosted rubber is the same.
The thought is, is the added booster the same weight as the cutoff.

 

[igorponger]

Heh, there was an informal inquisition on typical boosting procedure as currrently adopted with national players. It came out that a single spoonful of booster is needed for a single rubber treatment on average, that is an equivalent of 15 ml liquid. Normal volumic gravity of oil stuff 0.85 --0.90 g/cm3.
__________________
Be erudite of everithing

 

[Tony's Table Tennis]

anything you put on will have weight
but you also cutting off rubbers
so your answer is yes, it will add weight
but about how much heavier it gets, you would also need to factor in how much you cut off.

glues, boosters all have weight

 

[Robin0910]

In short: yes.
in detail: the rubber expands but the mass of the rubber itself will not change since you can’t create mass from nothing. It’ll get heavier the more booster you put on it, that’s where the added mass comes from.
You can measure this by measuring the naked (perfectly cut!) rubber first, then the booster bottle‘s weight with a very accurate scale before and after applying the booster so you get the mass of the applied booster. Afterwards, you’ll measure the blade naked and the rubber after the glue is applied, with this you get the mass of the glue. Finally, you stick it onto the blade and cut off the overhang. You weigh the blade with the rubber attached, subtract the mass of the glue and the blade. You divide this number by the initial weight of the naked cut rubber, multiply it by 100 and you’ll get the exact percentage of how much heavier it got only because of the boosting effect.
Now looking back on it, you don’t even need to measure the booster, but you can have it as a fun reference, unless you want to know exactly how much heavier the rubber gets after each layer of booster which will never be the same amount and generally, the more layers you apply the more rubber area you can cut off, so it’s kinda pointless.

i might actually do this sometime but I need a more accurate scale first.

 

[Caracas]

The Mass conservation law say to me that yes.

 

[riemsesy]

In short: yes.
in detail: the rubber expands but the mass of the rubber itself will not change since you can’t create mass from nothing. It’ll get heavier the more booster you put on it, that’s where the added mass comes from.
You can measure this by measuring the naked (perfectly cut!) rubber first, then the booster bottle‘s weight with a very accurate scale before and after applying the booster so you get the mass of the applied booster. Afterwards, you’ll measure the blade naked and the rubber after the glue is applied, with this you get the mass of the glue. Finally, you stick it onto the blade and cut off the overhang. You weigh the blade with the rubber attached, subtract the mass of the glue and the blade. You divide this number by the initial weight of the naked cut rubber, multiply it by 100 and you’ll get the exact percentage of how much heavier it got only because of the boosting effect.
Now looking back on it, you don’t even need to measure the booster, but you can have it as a fun reference, unless you want to know exactly how much heavier the rubber gets after each layer of booster which will never be the same amount and generally, the more layers you apply the more rubber area you can cut off, so it’s kinda pointless.

i might actually do this sometime but I need a more accurate scale first.

Perfect!

 

[JustANoob]

It would be fucking weird if you are adding a substance to the rubber and the rubber remains the same mass.

 

[Tyce]

It's really simple
Weigh the amount of booster
Weigh the cutoffs

I would estimate that if you cut off about 1-2mm overhang, which sounds like a significant boost, would be heavier than what you slap on. Simply because you stretch the topsheet, even if you fill up the sponge

 

[piligrim]

The thought is, is the added booster the same weight as the cutoff.

No, its not same. I weighted my rubber before boosting and after boosting and cutoff. It was about 5g difference

 

[riemsesy]

It's really simple
Weigh the amount of booster
Weigh the cutoffs

I would estimate that if you cut off about 1-2mm overhang, which sounds like a significant boost, would be heavier than what you slap on. Simply because you stretch the topsheet, even if you fill up the sponge

ik had gehoopt dat jij 't al 's uitgezocht had ;-)

 

[riemsesy]

No, its not same. I weighted my rubber before boosting and after boosting and cutoff. It was about 5g difference

so.. you've done it and the result is.. it's ~5 gram heavier!
thnx for sharing

 

[jaghaimo]

I've boosted 2 sheets of H3 NEO (commercial) in the past. Cut to DHS Long 5. Here are the results:

sheet 1: 47g + 2 layers of Haifu Seamon = 52g
sheet 2: 49g + 3 layers of Haifu Seamon = 56g

Tried to have a thin, even layer each time. After applying each layer the rubber sat for 24h.