I love these discussions.
Of course tuning the rubbers is illegal. Even ITTF President comes on forums and explicitly says so. Doesn't anyone believe him of listen to what he sez? It is modifying the rubber which is the combo of sponge/topsheet and adding additives. By rules, it is clearly illegal.
How do the rules get enforced? ITTF has racket control with their ENEZ set real low. If the bat passes the 4 mm test, the consistnacy test, and passes the ENEZ, the bat is legal, no matter how much tuning the player did or did not do. A lot of modern tuners will have no VOCs by the time you test.
You ask yourself a question then. It is completely legal to use ITTF approved water glue (and hihgly emphisized to use water glue), open a new rubber right out of package, like Tenergy 05, let's say, and even have ITTF tourney officials glue it on with ITTF approved water bond. The rubber right out of the package is still emitting VOCs as it takes VOCs to produce and adhere a topsheet to the sponge. You have ITTF in a completely clean and supervised manner make your bat and it will VERY likely FAIL the ENEZ test. In this case, your bat is a fail, deemed illegal and you could be considered a cheet. What a mess! What else can a player do to ensure he is legal? What if he cannot have access to a new rubber that is already aired out? He is S.O.L. (An American saying for Shyt Outta Luck)
Also, it is completely legal for TT manufacturers to tune the daylights outta the rubber at the "Factory" and seal it, then send it off for wholesale & retail distro. As long as you "Air out" the rubber for a few days to let the VOCs dissapate, then you are good to go if you did not have any VOCs left over from your glue job.
Is is ILLEGAL to tune your rubber after it is produced, ITTF president states this emphatically. You ask yourself, what is the real difference in the rubber if the factory tunes it and sells it to me, or if I buy a cheaper version of the same rubber and tune it myself for teh same endstate - a tuned rubber with no VOCs emitting from it and it is under 4 mm and flat/consistant. Thsi is also a mess!
Who is the cheater and who is the eater? (of moar profit?)
Maybe this is not the place to this post but here it is.
You have all the reason,ITTF has being implementing some sort of strange rules,rules that are a bit capitalist,and most not necessary in my way of view.
I believe that VOC's are bad for health etc,everyone knows it,and nothing against they ban it on our glues,but ban boost(that easily get free of vocs and i see to be no harmful),its kinda no sense.
Game is gettin' slow about this changes,and yes,table tennis never was a slow sport,but is gettin slower.
Most of this new stuff that is commin for Table tennis,is all about marketing and making profit atm.
I remember the times when i wanted to buy a bat, and the choices were limited,there were about 6,7 trade marks available,and the prices were affordable.
No need of booster,just get the right glue or DIY.
That was the time from where the greatest champions came of,surely.
Table-Tennis is gettin a sport for rich people,when i started playing...even the "barefoot" played.
That doesnt mean i dont like table tennis,cuz it has borned in my blood,it means the things are not really going in the better way,imo.
Keep trainin'