Stretching is an essential process for making screen printing plates. Stretching the net is to fix the silk net firmly on the net frame under a certain tension. And make the stretched silk screen have a certain tension to meet the requirements of photosensitive agent coating and other plate making. The size of the screen tension and the quality of the stretched screen are directly related to the quality of the screen printing plate, and also have a direct impact on the printing quality. When printing in color, the screen tension of each color version of the color screen printing plate must be kept basically the same, so as to ensure the accurate color printing. Only by stretching the web, can the quality of plate making and printing be guaranteed. 1. Before using, the new and old screen frames must be determined whether they are flat before they can be used. The unevenness of the screen frames will seriously affect the fastness of the stretched net. At the same time, the screen frames must be evenly and fully polished before they can be used. 2. The new frame must be cleaned of oil stains, the old frame must be removed of the original glue, and it must be cleaned before use. 3. The best use temperature for viscose adhesive is ≥25 ℃, the humidity is between 50% and 70%, the temperature is low, the drying time is correspondingly extended, and the drying time is shortened accordingly when the humidity is low; when the humidity is> 70%, the drying time should be extended accordingly If necessary, apply infrared light to dry with fan to dry. 4. Special attention should be paid to the cold weather, because the moisture in the air condenses on the surface of the frame, although the humidity is not high at this time, it should be dried or used in the sun after drying. 5. In rainy days or springs, because the air is relatively humid, in addition to the normal handling of the frame, special attention should be paid to the drying of the frame before applying the glue. When stretching the glue, a dehumidifying device should be prepared or the infrared lamp should be used in conjunction with the fan to dry. 6. The temperature of the oven is preferably 40 ~ 45 ° C. If it exceeds 50 ° C, the viscose adhesive will start to soften and it is easy to drop the net. It should be noted that many peers like to use cheap all-purpose adhesives as viscose adhesives, please use them with caution. Compared with viscose adhesives, universal adhesive stretch nets have the following disadvantages: ①The surface viscosity is large and it is not easy to penetrate the net; ②The drying time is long and the work efficiency is low; ③The film is soft, the initial viscosity and the final stretch net strength are not high; ④Coated Poor brushing, easy to draw; ⑤ poor adhesion to the frame; ⑥ easy to off the net in rainy and wet days. These are taboos of viscose, so it is better not to promote their use. 7. After sticking the net with universal adhesive, it is not easy to tear the old net and stretch the net. The remaining universal adhesive on the frame is uneven, which affects the next stretch of the net. Glass Tips,Glass Filter Tips,Glass Filter Tip,Custom Glass Smoking Tips NANTONG OUFEIYA IMP& EXP CO.,LTD , https://www.nantongoufeiya.com