Distinguish the canvas production process. The card cloth light box is a frameless profile without a face cover. It can be understood as being stuck. It is a light box whose canvas cannot be moved at will. The pull-up light box has two types of profiles: four-side opening and side opening. It has a face cover. It can be said that the canvas of this light box can be easily replaced in two steps.  

 Distinguish the type of canvas. Take the parking lot sign light box as an example. The card cloth light box canvas is made of soft film, 3P cloth and pearl cloth. 

The pull-up light box canvas is made of light sheet, Polaroid cloth, knife scraping cloth, and other materials.  

 Distinguish the canvas fixing method. The card cloth light box canvas fixing method is to sew the adhesive strips on the four sides of the picture, and then clamp it in the card slot of the light box frame. The pull-up light box is to open holes on the four sides of the canvas and punch metal grommets. 

Use cable ties to connect the canvas to the hook in the light box frame and further tighten it. In fact, during the sign engineering project process, the decision should be made based on the actual scene needs. It is not necessary to use pull-up light boxes or card light boxes. 

For example, a certain scene may need to frequently change the information content of the advertising sign, especially in supermarkets, so pull-up light boxes are generally used. 

On the contrary, the light box luminous signs in some scenes are an integral part of the decoration process and do not need to be replaced frequently. In addition, the requirements for the cleanliness and precision of the yellowing are relatively high, so card light boxes are usually used.