▶ LED Yellowing Cause: 1. The baking temperature is too high or the curing time is too long, leading to discoloration. 2. Improper ratio of the adhesive components, especially when there is an excess of part A, which tends to yellow more easily. Solution: 1. Cure and demold the AB glue at 120-140°C for 30 minutes. Exceeding 150°C may cause yellowing. 2. For optimal results, cure at 120-130°C for 30-40 minutes. Prolonged exposure above 150°C can lead to discoloration. 3. When manufacturing large lamp holders, reduce the curing temperature to prevent excessive heat exposure. ▶ LED Bubble Problem Cause: 1. Bubbles in the cup: Poor adhesion of the bracket. 2. Bubbles on the bracket: High curing temperature causes rapid epoxy reaction. 3. Cracked rubber or burst top: Insufficient curing time leads to incomplete or uneven resin hardening. Also, the AB glue may have exceeded its usable lifespan. 4. Surface bubbles on the lamp head: Difficulty in defoaming the epoxy glue, or insufficient vacuum application by the user, along with prolonged glue time. Solution: Adjust the process or consult your epoxy supplier for better results based on your usage. ▶ LED Bracket Creeping Cause: 1. Uneven surface of the bracket creates capillary action. 2. Volatile materials present in the AB glue. Solution: Contact the supplier for further assistance and product evaluation. ▶ LED Package: Short-Baked Off-Die and Long-Baked Discoloration Cause: 1. Overcrowded stacking in the oven reduces air circulation. 2. Localized high temperature inside the oven. 3. Presence of other color contaminants in the oven. Solution: Improve ventilation, clean any color stains, and confirm the actual temperature inside the oven. ▶ Some lamps on the same row of brackets show color variation or gel time differences, resulting in inconsistent quality. Cause: Insufficient stirring of the mixture. Solution: Ensure thorough mixing, especially in the corners of the container, to achieve uniform consistency. ▶ Difficult to Demold Cause: Issue with the AB glue or the glue hasn't reached proper hardness. Solution: Contact the supplier to confirm the correct curing temperature and time. ▶ Same dosage of the same lotion applied, but different colors in the final product. Cause: Uneven toner concentration or pigment precipitation. Solution: Warm the toner before use and mix thoroughly to ensure even distribution. Micro COB LED Display,Micro COB LED sign display,COB LED display video wall,Small Pitch COB LED signage,Mini COB LED display Panel,Fine pixel pitch Micro COB LED screen Shenzhen Xinfei Century Technology Co., Ltd. , https://www.rgbdancing.com