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Company Profie
LB-1900G is a kind of dilute alkali developable and solder resist ink, which is also bi-component, screen printing and UV contact exposure. The coated film processed by high temperature hardening will be provided with high insulation and high solder resistance, and the feature is more suitable for precise circuit board.
Procedure Content （1）Dilution and viscosity adjustment To stir for 5-10 minutes till it’s well proportioned. If the viscosity needs to be adjusted, 1-2% of the diluent can be added in. It’s recommended to use BCS diluent.
（2）Standing To stand 10-15 minutes after fully stirring, and then to process screen printing. (3) Screen mesh Either 36T or 43T is available
(4)Pre-curing A：To print and cure each side separately: The first side in hot air circulating oven: 75±5℃、15-20 minutes. The second side in hot air circulating oven: 75±5℃、20-25 minutes. B：To print and cure two sides at the same time. Hot air circulating oven: 75±5℃、25-35 minutes.
(6) Developing Developing solution: (1±0.2%) of Na2CO3 solution Temperature of developing solution: 30±2℃ Developing time: 40-60 seconds Washing pressure: 1.8~2.2kg/c㎡ (7)Posterior curing Temperature: 150±5℃ Curing time: 60 minutes Matters need attention： 1. To fully stir till it’s well-proportioned before using it. 2. Parameters above is only for reference, the specific operation should be subject to samples.
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