BPS PCBs are lead-free and RoHS compliant, and can be soldered with either lead-free solder (e.g., SAC305 — tin/silver/copper) or traditional 60/40 or 63/37 tin/lead solder. The anti-tarnish coating on BPS copper makes soldering easy with either type.

For hobby and prototype work, 63/37 rosin-core solder in 0.6mm to 0.8mm diameter is a popular choice. It melts at a lower temperature and flows well, which is forgiving for beginners. Lead-free solder requires a slightly higher iron temperature (typically 350°C vs. 320°C) and benefits from quality flux.

Use a temperature-controlled iron and a fine chisel or conical tip for 0.1" pitch through-hole work.