With the enhancement of environmental awareness, many engineers andPCBBoard manufacturers all strongly recommend lead-free productsPCBHowever, due to unscrupulous merchants choosing inferior products to replace lead-free ones in order to earn more profitsPCBThe boards were sold to the market, causing many people to be confused and mistakenly purchase inferior productsPCBToday, our Jia Jinyuan solder paste Factory will guide you on how to choosePCBChoose a qualified lead-free board to avoid detoursPCBBoard.

First of all, in terms of appearance, on the circuit board, the lead-containing surface appears to be the first bright white, while the lead-free surface is light yellow (because lead-free soldering contains copper metal).

The second type, in terms of touch, if you touch the solder with your hand, lead-free solder paste will leave a pale yellow mark on your body, while leaded solder will leave a black mark.

Thirdly, in terms of composition, lead is the main factor for tin and lead, while lead-free soldering has a lower lead content500PPMDue to the factors, lead-free solder usually contains metal elements such as tin, silver or copper.

Fourth, in terms of operation: Leaded solder is suitable for soldering lead-containing products, and the technical tools and components it uses are all lead-containing. Lead-free solder paste is suitable for soldering lead-free products exported to Europe, America and other regions. The technical tools and components it uses must be lead-free.

Through the above four methods, we can distinguish it relatively easilyPCBWhich kind of board is usedSolder pasteWelding process. Even though lead-containing processes have the advantages of low cost and brighter surface, under the pressure of environmental protection policies in recent years, the survival space for lead-containing products has been shrinking. The main reason for this is thatPCBWastewater discharge from lead-containing processes, as well as leadPCBAfter the product is discarded, whether it is disposed of by landfill or incineration, the lead content will eventually return to the environment through the medium of transmission, causing serious lead pollution and posing a great threat to the environment and human survival. If you have more technical questions about solder paste knowledge, you can follow the online message of JJY solder Paste Factory to interact with us!