immersion tin PCB — inspection and release briefFINISH NOTE / REVISION1. Total versus free tin2. Measurement time and basis3. Thermal / storage history4. Connector-specific holesOne controlled specification connectsdesign, fabrication, inspection andassembly.A photograph is product context. Adrawing states the requirement. Atraceable report supplies evidence.Do not substitute one for the other.Original engineering illustration · conceptual, not to scale