We all know that Solder Paste sometimes fails to wet and adhere properly when its activity is too low. Does that mean the higher the activity of the solder paste, the better? Next, JJY, Solder paste manufacturer, will break this down for you:

Solder paste activity is closely tied to the total amount of active agents added. Generally, solder that performs poorly in wetting and tinning does so because its activity is too low. Some may say, "Then just add more active agents, wouldn't that work? That way, soldering would surely be excellent." In reality, this is a misconception.

Active agents are inherently corrosive and irritating. If too much is added to the solder paste, although the expected wetting performance during stencil printing may improve, it poses a corrosive and irritating risk to the PCB board itself, potentially damaging the traces and shortening the board's service life — which is not worth the trade-off.

Therefore, solder paste activity is not a case of "the higher the better"; a moderate level is sufficient.Shenzhen JJY Industrial Technology Co., LTD has more than ten years of experience in solder paste and Solder Wire R&D. Solder wire We are a manufacturer of solder paste and solder wire, offering lead-free solder paste, Leaded Solder Paste, solder rods, and related products.