| Condition | Description | Reasons | Solution |
| Condition | Internal Cracking | Due to excessive shrinkage stress in individual layers of thick-walled products, bosses or ribs. | Reduce the feeding area so that the fibers are better interwoven between the layers and reduce the molding temperature. |
Ultraviolet light is the main reason to the application of anti sunshine. FRP made of vinyl ester ……
Condition Description Reasons Solution 1 Metal damage in the direction of applied force……
It is difficult to discuss in detail each control factor in every step of the preparation process ……