[Robin] starts with a demonstration of just how far a little bismuth depresses the melting point of tin solder — to about 135°. That allows plenty of time to work, and freeing leads from pads ...

Early soft soldering used pure tin (Sn), yet gradually alloys were sought ... as did the addition of nickel (Ni) and bismuth (Bi), with the latter also decreasing the melting point of the alloy.

It’s often as a byproduct of mining other metals such as lead, copper, and tin ... solder and non-toxic ammunition. This also makes it a pretty safe crystal to have. For a deeper dive into ...

It is commonly obtained as a by-product in copper, lead and tin ... Bismuth has many interesting properties that have led to several applications in industry, and it is commonly used in solders.