Differences between the three:

First, the difference in form:

The particles of long rubber face upward, with a height of more than 1.5 mm; the content of raw rubber colloid particles It is larger than normal rubber, with softer colloidal particles and greater elasticity; positive rubber is a short-grained rubber with particles facing outward.

Second, the difference in performance:

1. Comparison in terms of spin:

The performance of positive glue is most similar to that of reverse glue, and it has a certain ability to manufacture rotation ; The characteristic of raw rubber is that it does not rotate, and the manufacturing and rotation ability of long rubber gradually decreases. Among the three types, the normal rubber has the fastest rotation, and the long rubber has a certain anti-rotation performance;

2. Comparison in terms of speed:

The speed of the raw rubber is stronger than that of the normal rubber, while the normal rubber has a certain anti-rotation performance;

2. Glue is stronger than long glue. The main reason is that the long rubber particles are longer and will fall down when touching the ball. The potential energy of the incoming ball is partially converted into the potential energy required for the lodging of the rubber particles, resulting in the poor elasticity of the long rubber particles. The particles of raw rubber and rubber are shorter, so there is generally no problem of rubber growth. However, because natural rubber is more elastic than vulcanized rubber, the elasticity of raw rubber is greater than that of rubber, and the kinetic energy of the incoming ball can be absorbed more. Return, then the ball will be released faster.

3. Differences in playing styles:

Raw rubber and positive rubber are fast and weak in rotation, and are mainly used for fast breaks near the table or fast arc play near the middle table. In summary, speed wins. The long rubber has neither speed nor rotation, but it has the advantages of anti-rotation and no rotation, and is mostly suitable for controlled and mobilized play.