How Do You Solder without Flux?

Question

How do you solder without flux? I see people do it and the solder connections look solid and shiny. I know that using leaded solder makes it easier, but I still need to use flux in order to get that solid and shiny connection. I've heard that using solder with a particular ratio of flux to solder is important.

Former Member · Accepted Answer

Thanks so much. So I've learned that, even though the manufacturer shows a shelf life of 2 years, that may not be a big concern. Also, that for leaded solder, my iron temperature should be between 600F and 700F. I do see smoke when I solder which substantiates that 800F is too darn hot. I learned from the Kester website that there are variety of cored solder with a variety of types of chemical. I think I will lower my iron to 700F and see what happens. Thanks again.