Which is better, alpha solder paste or Japanese Qianju solder paste?

Alpha solder paste and Japanese Ju Chi solder paste are similar in welding effect, but different in welding slag. Generally speaking, Alpha solder paste has less slag, while Japan Qianju solder paste has more slag.

Alpha solder paste produces less residue during welding, which makes the subsequent cleaning work easier. However, there are many residues in the soldering process of Ju Chi solder paste, and additional cleaning steps may be needed.

It should be noted that the above contents are for reference only, and the specific selection of solder paste needs to be decided according to the specific welding requirements and environmental conditions. If more detailed information is needed, it is recommended to refer to professional books or consult experts in related fields.