or brown
flowers similar in appearance to amber. It is possible that looking at puffs of smoke with inherent odors, they wondered why rosin is used when soldering.
Rosin, when heated to 150 ° C, dissolves tin oxide, lead oxide and copper oxide, it is constantly used in radio -
and electrical industries
as a flux - an anti - oxidizing element that cleans the surface of the soldering area well, improves spreading and reduces the surface tension of the material from solder.
For soldering, I collect fresh raw gum - resin of conifers (pine or spruce).
The resin consists of turpentine and rosin, therefore, in order to obtain rosin, it must be boiled and the turpentine will evaporate.
In a metal tin can you put the collected resin and start to heat it on a small fire, electric stove, gas burner, most importantly - on the street. I heat it until the resin begins to melt and boil. Here it is necessary not to overheat the resin, so as not to catch fire. With a wand I remove the surfaced garbage. When the boil ceases, then the turpentine has evaporated and pure rosin remains. Rosin can be poured into jars
or cardboard molds.
And for finer work it is possible to produce a flux in the form of acetone or alcohol solutions.
Cost: ~ 52