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What sign of solder wire is lead-free environmental protection?

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Update time : 2022-09-28 10:57:33
    Solder wire is divided into lead solder wire and lead-free solder wire, so how to distinguish lead and lead-free solder wire? In fact, it can be distinguished from the mark of the tin wire.
    The wire diameter, rosin content, and weight are generally written on the label of the solder wire, which are all very easy to distinguish. The wire diameter is marked with mm, such as 0.8mm, which means that the wire diameter is 0.8mm. Rosin content will be expressed in FLUX, followed by a number indicating the percentage of rosin content it contains. The weight is also very easy to identify, 800g, 1000g, etc. all indicate weight. There are also some signs on the solder wire label, such as ROHS. RoHS testing items are lead (Pb), cadmium (Cd), mercury (Hg), hexavalent chromium (Cr6+), polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs). These items must be substandard to comply with ROHS, which includes lead. That is, as long as there is a ROHS logo, it means that this solder wire is lead-free and environmentally friendly. In addition to this logo, there is also an English word that also indicates that this model is lead-free, and this English is lead free.
    Speaking of which, it is worth mentioning that there is still a little difference between lead-free and environmental protection. Lead-free is only for lead content. If it is environmentally friendly, it means that several toxic substances of ROHS are included. However, in our usual communication, lead-free is basically equivalent to environmental protection, and there is no difference. Lead-free products are not lead-free, but their lead content is less than 1000PPM, which is 0.1%. However, the lead content of lead-free tin wire is less than 300PPM, and there are products with special requirements and less than 100PPM.
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