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Management of raw materials is an extremely important aspect in environment friendly PCB manufacturing, take solder wire for example, if solder wire with lead-tin ingredients was mistakenly added to pure tin bath, it can lead to disastrous consequences.
Residue of indirect materials such as solder flux can not be ignored too, specific Measures can be taken as below:
1. Establish coding rules for halogen-free and lead-free raw materials;
2. color-labeling for packages, outer and inner packages of PCB raw material to be pasted with IQA recognized "green" label;
3. In the warehouse and production line, keep environment friendly raw materials separately, assign special workers to make the routing control of it.
4 "green production qualified supplier" certification program for PCB raw material suppliers.
Of cause, there are other methods and systems to control lead free production of PCB, it depends on each PCB manufacturers sop.
