LED yellowing the reason: 1. The baking temperature is too high or the time is too long; 2, the proportion of the glue is wrong, A glue is more likely to yellow. Solution: 1. AB glue is cured and demolded in 120-140 degrees / 30 minutes, and it is easy to yellow when it is baked for more than 150 degrees. 2. AB glue is cured and demolded at 120-130 degrees/30-40 minutes. If it is over 150 degrees or baked for a long time, it will yellow. 3. When making a large lamp holder, reduce the curing temperature. LED bubble problem the reason: 1. Bubbles in the bowl: The bracket is poorly glued. 2, bracket bubble: curing temperature is too high, epoxy curing is too intense. 3, cracking rubber, bursting top: curing time is short, epoxy resin curing is not complete or uneven. AB glue is out of service time. 4, the surface of the lamp head bubble: epoxy glue is difficult to defoam or the user does not use enough vacuum, the glue time is too long. Solution: Improve process or contact epoxy supplier depending on usage. LED bracket creeper the reason: 1. The surface of the bracket is uneven and produces capillary phenomenon. 2. AB glue contains volatile materials. Solution: Please contact the supplier. LED package short-baked off-die and long-baked discoloration the reason: 1. The stacking in the oven is too dense and the ventilation is poor. 2. The local temperature of the oven is too high. 3. There are other color pollutants in the oven. Solution: Improve ventilation. Remove color stains and confirm the actual temperature in the oven. The lamps on the same row of brackets have some coloring or gelling time, and the quality is uneven. the reason: Stirring is not sufficient. Solution: Stir well, especially at the corners of the container. Not easy to demould the reason: There is a problem with the AB glue or the glue does not reach the curing hardness. Solution: Please contact the supplier to confirm the curing temperature and time. Add the same dose of the same lotion, but the color of the product is different. the reason: The toner concentration is uneven; or the toner is precipitated. Solution: Warm the toner and mix well before using. Product categories of Disc Stylus Pen, We are the specialized manufacturer of Stylus Pen from China. Disc Stylus Pen no need to charge, you can use it directly, it is universal, it is compatible with all brands capacitive touch screens, such as Apple, Huawei, Samsung, Xiaomi, Microsoft, Google Chrome, ect. OEM / ODM are welcome, looking forward to our cooperation. Disc Stylus Pen,Digital Stylus Pen,Cute Ballpoint Pen,2 In 1 Stylus Pencil Shenzhen Ruidian Technology CO., Ltd , https://www.szwisonen.com