Which is better to use, solder paste or rosin?

At present, many customers are still unclear about how to distinguish rosin from solder paste (without alloy powder). Generally, it depends on the specific operation conditions. So, how should they be used correctly? Next, the solder paste manufacturer will share with the partners.

There is still a considerable difference between solder paste and rosin.

1Firstly, rosin is a natural soldering flux material, while solder paste (without alloy powder), also known as solder paste or flux, is a chemical product artificially mixed.

2The soldering properties of rosin are somewhat different from those of solder paste. Rosin is generally only suitable for soldering red copper, silver-plated and tin-plated surfaces with tin, but its performance is relatively poor when soldering iron, nickel and brass surfaces.

3When rosin is used for soldering, it emits a lot of smoke and there is a phenomenon of carbonization and blackening, which affects the quality of the weld points. Moreover, the melting point of rosin after carbonization becomes higher and its soldering flux properties deteriorate.

4Rosin is generally solid and cannot be applied to the welding surface. Generally, it is necessary to dissolve it in ethanol to obtain a solvent before applying it, and the ethanol must be evaporated and dried before welding can begin. Solder paste (also known as flux paste or fluxes) without alloy powder is a soft, paste-like substance that is easy to apply. It can assist in soldering a wide range of metals and solve the problems of smoking and carbonization quite well. It emits less smoke than rosin and is less likely to carbonize and turn black.

5In terms of the quality of solder joints, solder paste (also known as flux paste or flux) without alloy powder is still better. When using rosin cannot achieve bright solder joints, you can try using flux, and generally, satisfactory solder joints can be obtained.

What I want to tell everyone is that whether it's using rosin orSolder pasteThe usage method can all be as follows: Bring the tip of the soldering iron close to the part, send the solder wire towards the part, then lift the soldering iron upwards to form a conical shape, which is the best. However, do not use too much solder, as too much will not only waste solder but also easily come into contact with other parts nearby, causing a short circuit. This is just a brief introduction. In practice, one should also take into account specific circumstances and make judgments based on their own experience to obtain good solder joints. If you have any other questions, welcome to follow the online message of JJY Solder Paste Factory and interact with us!