What are the key quality inspection standards for screen-printed products in the automotive industry?

The key quality inspection standards for automotive screen-printed products mainly include four aspects. First, adhesion standard: use the cross-cut test (in accordance with ISO 2409) to ensure the ink adhesion reaches Grade 5B (no ink peeling at the cut), which is crucial for parts exposed to harsh environments. Second, durability standard: conduct weather resistance tests (UV aging, high and low temperature cycling) and wear resistance tests to ensure the printed patterns remain intact and clear after long-term use. Third, dimensional precision standard: the position deviation of printed patterns should be within ±0.1mm, and the line width error should not exceed ±5% of the design value, ensuring the matching accuracy with other automotive parts. Fourth, functional standard: for conductive printed parts (such as heating films), the resistance value should be within the design range, and there should be no open circuit or short circuit.