, also called short particle rubber, is characterized by good elasticity, high speed, steady hitting and no turning. It is suitable for near-table fast attack, especially the left-pushing and right-attacking style. It is one of the most commonly used types of rubber for straight-board fast attack players. In the past, a large number of world champions such as Zhuang Zedong, Li Furong, Jiang Jialiang and Xie Saike all used positive glue sponge to shoot directly. Liu Guoliang, the world champion today, also uses this type of rubber. If you feel that your wrist is flexible, but your arm and waist and abdomen are not strong enough, you'd better choose a positive plastic racket that wins with speed.

At present, there is a kind of medium-sized rubber between short particles and long particles in the international market, which has the peculiar effect of non-spin attack. This kind of rubber is not afraid of the strong draw or downward spin from the opponent's attack. In the past, it did not spin the ball, and it was erratic, which made the opponent unable to work hard. It is called "magic rubber".

● anti-glue

It is characterized by strong hitting rotation, stable hitting and easy control, and is suitable for arc-loop or arc-loop combined with fast attack. Because of its stable hitting and good control, it is also the first choice for beginners. For professional players, there are many kinds of anti-adhesive sponge bats with different properties to choose from, such as strong adhesive rubber and soft and thick matching sponge, which has good characteristics of "biting" and "wrapping" the ball. Reverse rubber sponge rubber is the most commonly used rubber rubber for straight and horizontal strokes, which is used by almost 1% of European players and nearly 8% of Asian players. Because this kind of rubber better takes into account the requirements of speed and rotation.

At present, most of the top international players use reverse rubber. For example, Waldner, persson, Sefer, Ma Wenge, Wang Nan, etc. who combined arc and fast break, Gaiting, Wang Tao, Kong Linghui, Deng Yaping, Li Ju, etc. who combined fast break with arc and fast break, and Ma Lin, Yan Sen, Feng Zhe, etc. who held the racket directly, all of them were in the same color, with the front or both sides covered with reverse rubber.

players who play reverse glue all hope that the rubber has high wrapping force, that is, the rubber surface should be sticky, so as to have high friction coefficient. I am afraid that amateurs do not have this condition except professional athletes who have the condition to change the rubber when playing a game, so we should know how to protect the stickiness of the rubber. The easiest way is to clean it with a soft foam sponge after each exercise. There are also special cleaners on the market, and the use effect will be better. Cover it with polyester film after cleaning, which can prevent dust and oxidation.

● Raw rubber

Raw rubber is rubber with upward particles and a diameter greater than the height. It is characterized by sinking the ball and weak rotation of the ball. Because raw rubber has the function of reducing rotation, it is especially easy to control the ball. At present, in order to get the change of hitting the ball, a group of horizontal-shot and double-attack players adopt the collocation method of forehand reverse glue (pulling the arc circle) and backhand raw glue (fast dialing and short swing). Today's world champion Wang Tao and famous players such as Chen Jing and Geng Lijuan all use backhand raw rubber, while South Korean and North Korean female player Zaian holds gadolinium and pepper? Joe unloaded the music seal and read it in the U-Temple? B style='color:black; background-color:#99ff99'> The rubber sheet can be used as an option for pasting the reverse side of the backhand.

● Long rubber

This is a thin and long rubber covering a thin sponge, which was invented in China in the 196s. In those days, Zhang Xielin used this kind of rubber to cut unpredictable balls, and was called a table tennis magician. This is because this kind of rubber ball will produce abnormal rotation phenomenon on the racket face. The typical change is: when the other side rubs the downward spin ball, when the other side rubs it with long rubber, it will fly back the above spin; The topspin ball attacked by the other side is pushed by the long glue and then spun back down; The ball will spin more when you hit the loop ball pulled by the opponent with a chop, but it will not spin when you pull the ball back. These abnormal changes often make the opponent make mistakes or return a high ball, which can often be easily won against people who are not familiar with the properties of long rubber. However, using this rubber to play ball, not only the opponent makes many mistakes, but also it is not easy for his own team to master, which greatly reduces the ornamental and entertainment of table tennis. In May 1998, the ITTF held a board meeting in Durban, South Africa. By 19 votes to 18 votes, it made a decision to ban the use of long rubber and stipulated that the ratio of height to diameter of positive rubber should not be greater than 1:1. Young athletes should never use long glue. On the one hand, long glue is difficult to master, on the other hand, a little carelessness can easily lead to wrong stereotypes. The Chinese Table Tennis Association has clearly stipulated that no long glue should be used in juvenile competitions.

● Anti-arc rubber

There is also a kind of anti-rubber sponge rubber called "Anti-arc rubber" which is specially used to deal with the arc ball. This kind of rubber is non-sticky, with a smooth and slightly astringent surface. The speed of hitting the ball is slow, the arc is short, and it sinks and drifts after landing, making it difficult for opponents to judge according to the routine, which is especially effective to deal with the arc ball. As mentioned earlier, this kind of rubber was pasted on the back of Cai Zhenhua.

In the above-mentioned table tennis racket covers, attention should be paid not only to the selection of rubber properties, but also to the selection of sponges, that is, to the thickness and thinness, hardness and softness of sponges. Generally speaking, the thick sponge eats the ball deeply, bites the ball for a long time, and hits the ball with sufficient stamina, which is more obvious when pulling the ball; On the contrary, the thin sponge eats the ball for a short time, hits the ball quickly and controls the ball well, but the ball has insufficient stamina and is not easy to kill the opponent. As for the hard sponge, it has the characteristics of short biting time and fast ball speed, which is suitable for fast attack; Soft sponges, on the other hand, are inferior in ball speed, but they control the ball better. Generally, people play more smoothly and stably.

In addition to sponge and rubber, glue used to bond sponge rubber also has a very important position in today's high-tech era. A special odorless quick glue can greatly exert its "drug effect" (it is said that it can improve the elasticity of rubber by 2%-3%) before the game, just like giving a racket a stimulant. This wonderful feature was accidentally discovered by Hungarian player KLAMPER. At that time, after he lost a game, he felt that the rubber of his forehand was not well glued, so he posted it again. Unexpectedly, this semi-dry rubber ball made the ball speed improve a lot. Nowadays, it is no secret that instant glue is used, but some people have become too superstitious about its function.

At present, it is not only required that the sponge rubber should comply with the regulations of ITTF, such as the total thickness of the adhesive should not be more than 4 mm, one side of the rubber must be bright red, the other side must be dark black, etc., and the rubber approved by ITTF and the glue used for sticking the rubber must be selected for participating in major competitions. At present, many varieties have been approved in China, and their edges have clearly visible trademark models and ITTF ITIF marks.

my recommendation is to use double-sided reverse rubber sponge as the main material, supplemented by positive rubber sponge on the front and reverse rubber sponge on the back. As an anti-adhesive sponge suitable for both professional athletes and amateurs, it is advisable to choose a type with strong viscosity and moderate elasticity. With the improvement of the understanding of table tennis rotation and the strengthening of ball control ability, in order to obtain the change of the ball, sponge rubber sheets with different properties can be arranged on the forehand and backhand sides. In a word, the choice of rubber, the configuration of positive and negative rubber types must vary from person to person. Qiu Zhonghui, a former world champion, said that table tennis is a sport with a strong "personality", and the types and models of rubber sheets are ever-changing, so we should rationally weigh them from our own conditions and technical characteristics.