What's the 4x8 Corrugated Plastic Signs? Corrugated plastic sign is economical. The sign can meet all your need of advertisement sign, such as sport sign, business sign or real estate sign. If you need long-term or short-term yard sign, corrugated plastic yard sign is the best choice. You can store the sign and reused it. There is many types of the outdoor advertising board, such as billboard, large screen card, signpost sign, day work signs, hazardous location signs and guiding signs. The advertising need well-formed, the corrugated plastic sheet with different color and thickness has its own beauty. The corrugated plastic sheet is made from high quality composite. the thickness, size and color of the corrugated plastic sheet can be made according to the customer's need. What's the working process of the 4x8 Corrugated Plastic Signs? The working process of the 4x8 corrugated plastic signs: Mold closing→HP mold locking at low speed→moving the injection moun