Even at home, you can make your own very high-quality solder paste. In this review, we suggest that you familiarize yourself with the detailed technology for making solder paste.
First of all, you need to get powder from the solder bar (the smaller, the better). For this, the author uses a disk mill with a diameter of 40 mm, the thickness does not matter.
Before "crumbling" the solder, it is necessary to make protection from a plastic bottle. We cut off the lower part, make a hole in the bottom and put it on the drill.
A disk mill allows you to immediately get a fairly fine powder and save time when working with a mortar. The cutter has a large tooth, and therefore is not clogged with soft solder, as is the case with medium and small files.
Useful Tips
When working with a mill, you need to be careful. A milling cutter with a large tooth is more likely to strike (a milling cutter to the side is possible due to a sharp entry of the milling cutter teeth into the material). The smaller the angle, the less likely it is to strike.
By changing the angle between the solder bar and the plane of the disk mill, you can adjust the performance, as well as the size of the resulting powder.
The main stages of work
The author mixes the resulting powder with salt. And you need to use only coarse salt (fine will not work). After that, grind the powder with a pestle.
Next, the finished powder is poured with water - you need to wash the precipitate several times. Then the precipitate must be wrung out and dried on the battery (about 10 minutes). sticky lumps are ground into a fine powder.
In the next step, the powder must be divided into fractions. And for this, the author uses starch, from which it is necessary to make liquid jelly. Before adding the powder, it must be diluted with water, otherwise there will be lumps.
Starch can be replaced with gelatin, there will be no lumps guaranteed, but you will have to wait a couple of hours until the jelly cools down and sets.
In the end, we get a fine precipitate and a large precipitate. Pour them into different boxes. For pasta, of course, it is better to use fine powder.
Cooking pasta
After that, you will need to mix the flux with a fine powder in a proportion of 40/60 (by volume). For mixing, you can use a wooden stick or, for example, a wire.
We fill the resulting syringe with a regular syringe. We put a piece of heat shrink tube on the nose, at the other end of which we insert a thin syringe. This is the only way to avoid air congestion.
We put a needle on the nose of a thin syringe, and you can use the paste for its intended purpose. Very comfortably!
For details on how to make solder paste yourself at home, we recommend that you watch in the video on the site.
