Zhang Jike Shows You How to Boost and Glue Your Racket

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The difference in air pressure in 1.2m height in room with 50m ceiling vs 20m ceiling is so small (less 1/1000 of the overall air pressure) that I can hardly believe you would notice this in ball speed. But if so, I still don't get the point, that such a minuscule difference is then "corrected" with additional boosting layer(s). Sounds a bit like voodoo to me. But if it makes one more confident, than it already achieved a purpose
 
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I’m not sure if the translation was right but he mentioned that they never host games/tournaments in Xinjiang and Yunnan province due to the climate there being more dryer making the ball spin more. Is this true that a dryer climate will make the ball spin more?
 
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There is a lot information that is not shared here in the video right? Obviously we cannot expect Zhang Jike to reveal everything the CNT team does w.r.t boosting. What is the total duration of boosting, time interval between layers, do they do it themselves or does somebody does it for them? Given that they practice and play tournaments regularly, there ought to be some consistent method to this boosting process that needs to be followed every time for them to get the same feel and characteristics from the rubber/blade combo, which is what is not revealed here.
 
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There is a lot information that is not shared here in the video right? Obviously we cannot expect Zhang Jike to reveal everything the CNT team does w.r.t boosting. What is the total duration of boosting, time interval between layers, do they do it themselves or does somebody does it for them? Given that they practice and play tournaments regularly, there ought to be some consistent method to this boosting process that needs to be followed every time for them to get the same feel and characteristics from the rubber/blade combo, which is what is not revealed here.
We have a popular ukrainian proverb: They gave you honey, maybe they'll give you a spoon too
 
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There is a lot information that is not shared here in the video right? Obviously we cannot expect Zhang Jike to reveal everything the CNT team does w.r.t boosting. What is the total duration of boosting, time interval between layers, do they do it themselves or does somebody does it for them?
you are right
I had a look at the video and my first response would be, haha
half the message.

I'm also not going to share what some of the players I know boost, simply it is taboo subject.
the moment ITTF makes it legal to boost, then I can share how few players I know boost (and yes, this includes Butterfly rubbers on both sides too)
 
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some people do it,
its not wrong
everyone does things differently
It's not wrong, but it doesn't do anything special either. As I said, if it helps build confidence, power to them but scientifically I don't see the point of gooing up the glue and having the sponge absorb the booster suboptimally if at all.
It would only be wrong if it failed the racket tests IMO. Other than that you're basically free to do whatever.
 
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It's not wrong, but it doesn't do anything special either. As I said, if it helps build confidence, power to them but scientifically I don't see the point of gooing up the glue and having the sponge absorb the booster suboptimally if at all.
It would only be wrong if it failed the racket tests IMO. Other than that you're basically free to do whatever.
i don't think CNT A team players are short of confidence :)
 
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In the original video, ZJK said "bigger and taller table tennis halls have resistance", literally (last link below). It's implied to mean air resistance so the sub is not wrong. He even followed it by saying the height of the ceiling typically determines the size of the hall and hence the resistance with examples.

ZJK is not wrong here as air density tends to vary more in those halls with higher thermal stratification, layering of air at different temperatures from ceiling to floor, the colder it is the closer to the floor which leads to denser air and hence higher air resistance.

Counterintuitively, humid air is actually less dense than dry air at the same temperature and pressure, therefore speed and spin should dissipate at a slower rate. The reason they may dissipate faster is because water has higher dynamic viscosity than air (but air has higher kinematic viscosity which complicates things) so it may cancel out the drop in air density.

Full live stream
张继科20250617直播2:粘球板的方法与球馆的大小和地区有关系,不是一种粘法粘全部
https://www.bilibili.com/video/BV1aQNLzhEbu/

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张继科 | 0617直播 海绵刷油独家小技巧来也~
https://www.bilibili.com/video/BV1avNzz8EL6/

张继科 | 0617直播“现在还允许大家刷油的时候,你不刷油,你已经吃亏了…没有专业球员不刷油的。”

[张继科]关于正反手球板的粘胶方法和注意事项!
https://www.bilibili.com/video/BV1bPNjzpEcC/
 
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There is a lot information that is not shared here in the video right? Obviously we cannot expect Zhang Jike to reveal everything the CNT team does w.r.t boosting. What is the total duration of boosting, time interval between layers, do they do it themselves or does somebody does it for them? Given that they practice and play tournaments regularly, there ought to be some consistent method to this boosting process that needs to be followed every time for them to get the same feel and characteristics from the rubber/blade combo, which is what is not revealed here.
吴汀/Wu Ting, manager of Haifu, shared some more back in 2016. Reproducing the post below.

http://mytabletennis.net/forum/boost-like-the-cnt_topic80299.html
Since the other thread is getting nowhere with the original question, I feel obliged to update the naughty folks on how the CNT boost.

This thread is not for the argument on ethics, remorse, karma...etc. Please proceed to the other thread for that. The purpose of this thread is for the exchange of knowledge.

This video was uploaded by magazine Ping Pong on Apr 22, 2016, in response to Boll's allegation moments before the WTTC Kuala Lumpur 2016.

https://v.qq.com/x/page/t0304xpzbnw.html
https://v.qq.com/x/page/t0313vjqm6e.html
http://v.youku.com/v_show/id_XMTU0NDQ0MTMxMg==.html

In the video, Peng You, chief editor of the magazine Ping Pong, talked to 吴汀/Wu Ting, manager of Beijing Haifu Weiye Technology Company(info from 2010, could be outdated), on the origin, objective, and use of booster.

It is revealed the CNT players leave all the dirty work to this man. They tend to boost every 3 to 4 days. They prefer to prime the sponge with a layer of booster, then a few layers of water-based glue as another primer, then a few layers of booster. The exact number of layers of glue and booster depends on the preference of the players, but most prefer 3 layers of glue.

He prefers no booster on the sponge and recommends 3 layers of glue then 3 layers of booster for Chinese rubbers with the Yunhai sponge, to increase bite and the forward and downward momenta of the second bounce of the shot(what some call the spin effect). Another reason for the glue primer is to serve as a protection for the sponge. For foreign rubbers(JPN/GER), he recommends 3 layers of glue and 1 layer of booster on the sponge, 2 at most, to prevent the pores of bubble from bursting.

He also emphasizes the job of the gluing is the most important aspect.
 
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The difference in air pressure in 1.2m height in room with 50m ceiling vs 20m ceiling is so small (less 1/1000 of the overall air pressure) that I can hardly believe you would notice this in ball speed. But if so, I still don't get the point, that such a minuscule difference is then "corrected" with additional boosting layer(s). Sounds a bit like voodoo to me. But if it makes one more confident, than it already achieved a purpose
That's what I was thinking. How can a minuscule difference in air pressure affect the trajectory of a falling ball enough to make a professional TT player mis hit??? If they can smash long pip floaters there is no way air pressure difference should have any affect.
 
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Ahem, ZJK said air resistance and the sub is right.
 
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I’m not sure if the translation was right but he mentioned that they never host games/tournaments in Xinjiang and Yunnan province due to the climate there being more dryer making the ball spin more. Is this true that a dryer climate will make the ball spin more?
Do you have a link to the video? I can take a look.

Drier air actually reduces the spin on the ball faster. Xinjiang and Yunnan are actually high altitude provinces like Colorado, with thinner air, which is the primary reason behind faster and spinnier balls but less dip as well, so you can't hit as hard in order to land the shots.
 
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I've got to say that his idea that halls with higher ceilings result in "higher air pressure making it harder to play" is utter bollocks.

P.S.: Wouldn't surprise me if he said something completely different and it was mistranslated.
Agree, I play regularly in two halls One with and one without high ceiling. I have experienced both feelings in both halls. If You have open windows then air pressure would be exactly the same.

No it has more to do with the ventilation and current barometric pressure and humidity.

And don’t forget the spectators…

Cheers
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The difference in air pressure in 1.2m height in room with 50m ceiling vs 20m ceiling is so small (less 1/1000 of the overall air pressure) that I can hardly believe you would notice this in ball speed. But if so, I still don't get the point, that such a minuscule difference is then "corrected" with additional boosting layer(s). Sounds a bit like voodoo to me. But if it makes one more confident, than it already achieved a purpose
It's probably the humidity. Players release a lot of moisture via sweating and fast breathing while playing, and a smaller hall would get more humid, which results in more magnus force. Since boosters like speed glue affect spin more than speed, one may want to compensate by using a bit more booster in bigger, drier halls.
 
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