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PostPosted: 27 Jun 2020, 21:20 
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I want to know the average weight of the 2 or 2.1mm sponges without the rubber cut for the blades.

TIA.


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PostPosted: 01 Jul 2020, 22:50 
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Here is the info you are looking for, you will have to sort through and look only at the 2.0, 2.1 sheets. It is complicated because the sheets are not the same size, so you may want to look at the mass/sq cm column at the right side of the chart.

Have fun.

https://tabletennis-reviews.com/reference/rubber-sheet-mass-size-database/

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PostPosted: 02 Jul 2020, 01:54 
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The mass of 2.0 mm sponge sheet (excluding topsheet) will usually vary from 16 to 24 grammes, depending on given sponge density.
Typical sponge density is measured around 0,45 g/cm3 .(not boosted).

/Be happy/


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PostPosted: 02 Jul 2020, 02:40 
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merlin el mago wrote:
I want to know the average weight of the 2 or 2.1mm sponges without the rubber cut for the blades.

TIA.


There's no point knowing this unless you also measure the size of the sheets. Typically Japanese sheets are 1cm longer than ESN sheets, which is why Butterfly sheets and Tibhar Evolution sheets seem to be so heavy. Once you've divided the weight by the area, you get areal density (g per sq. cm) which you can use to compare sheets.

I've got a pretty big database of sheet weights, all based on stuff I've used (and weighed, and measured) myself. Maybe one day I'll post the whole thing. Look under my "training rubbers" thread - quite a bit of info there. Most sheets are "max" because that's all that is available, and I usually don't buy thinner sponge when it is available.

Iskandar


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PostPosted: 02 Jul 2020, 07:54 
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Attachment:
worn_area.png
worn_area.png [ 29.46 KiB | Viewed 186 times ]
ρ = 0.45 g/cm3 . . Sponge Material Density

t= 0.20 cm . . Sponge Sheet Thickness

S= 200 cm2 . . Square Measure of the Cut Rubber Sheet

This is a direct clue.
I'm pleased to invite you all to exert your mental power, if any.


Come on ...


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PostPosted: 05 Jul 2020, 02:18 
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1dennistt wrote:
Here is the info you are looking for, you will have to sort through and look only at the 2.0, 2.1 sheets. It is complicated because the sheets are not the same size, so you may want to look at the mass/sq cm column at the right side of the chart.

Have fun.

https://tabletennis-reviews.com/reference/rubber-sheet-mass-size-database/


Thanks, I'm looking for Fastarc G-1 but I didin't see in the link.


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PostPosted: 05 Jul 2020, 02:18 
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iskandar taib wrote:
merlin el mago wrote:
I want to know the average weight of the 2 or 2.1mm sponges without the rubber cut for the blades.

TIA.


There's no point knowing this unless you also measure the size of the sheets. Typically Japanese sheets are 1cm longer than ESN sheets, which is why Butterfly sheets and Tibhar Evolution sheets seem to be so heavy. Once you've divided the weight by the area, you get areal density (g per sq. cm) which you can use to compare sheets.

I've got a pretty big database of sheet weights, all based on stuff I've used (and weighed, and measured) myself. Maybe one day I'll post the whole thing. Look under my "training rubbers" thread - quite a bit of info there. Most sheets are "max" because that's all that is available, and I usually don't buy thinner sponge when it is available.

Iskandar


I'm looking for the information with the sheets cut for the blade.


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PostPosted: 05 Jul 2020, 02:20 
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igorponger wrote:
The mass of 2.0 mm sponge sheet (excluding topsheet) will usually vary from 16 to 24 grammes, depending on given sponge density.
Typical sponge density is measured around 0,45 g/cm3 .(not boosted).

/Be happy/


So an average is 20g ok full sheet or cut for the blade as requested?


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PostPosted: 08 Jul 2020, 18:31 
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Igor forgot the "topshit" weighs something.. and that sponge density varies greatly from sample to sample, even for the same brand and type of rubber.

He is right that most blades have a rubber-covered area of about 200 cm^2. Not sure why he had to illustrate it with a red lollipop though.. :lol:

Iskandar


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PostPosted: 09 Jul 2020, 01:00 
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merlin el mago wrote:

Thanks, I'm looking for Fastarc G-1 but I didin't see in the link.


Go to the link, scroll down to the database, you should see a search bar at the top right side of the database. Just type in Fastarc and you should find what you are looking for.

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PostPosted: 09 Jul 2020, 01:09 
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1dennistt wrote:
merlin el mago wrote:

Thanks, I'm looking for Fastarc G-1 but I didin't see in the link.


Go to the link, scroll down to the database, you should see a search bar at the top right side of the database. Just type in Fastarc and you should find what you are looking for.


Got it, many thanks.


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PostPosted: 09 Jul 2020, 01:44 
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merlin el mago wrote:

Got it, many thanks.


You're welcome, hope the info helps. I've been sensitive to wight since I had (table) tennis elbow. Let us know what you decide, G-1 is one of the rubbers I've been testing while we have not been playing at the club. Not sure how much I learn playing against a robot, I know some high level players and coaches recommend it.

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PostPosted: 09 Jul 2020, 01:55 
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Being asked of "average" figures, Specific Weights seen in most of foamed rubbers is 0.45. Look into the data base of sporting materials/


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