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How to Use Rosin in Soldering: Practical Applications and Techniques for Beginners

xamrex 117085 19
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  • #1 4467086
    xamrex
    Level 28  
    I have already searched the forum and google for information about rosin.
    But I didn't find what I was looking for :(
    In fact, I have a few questions
    I bought a rosin in such a tin (like shoe polish)
    And until now, after soldering, I had not used rosin at all. (I used tin with flux)
    But I already bought this rosin, it could use something for something :D
    But how to use it ??
    I know that from time to time you can dip the tip of a soldering iron in this rosin ...
    But what else is the use (such practical) of this rosin ...
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  • #2 4467106
    fuutro
    Level 43  
    Facilitates the even coating of the bare wire end with tin, is sometimes used to protect freshly etched paths, etc.
  • #3 4467109
    xamrex
    Level 28  
    okay
    But I mean, how can I use it ..
    So I have to cover the wire with rosin (dip it in the hot rosin, then pull it out) And then the tin will be evenly distributed over it?
  • Helpful post
    #4 4467122
    joozwa
    Level 31  
    The rosin could be dissolved in pure spirit (not salicylic), possibly in denatured alcohol. This solution is used to cover the tracks before soldering. A saturated solution at room temperature gives good results. Tin grabs until nice :) and what smell :D !! ...
    fuutro , rosin can be applied to whatever you like as a solution. Kisses
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  • Helpful post
    #5 4467128
    fuutro
    Level 43  
    It's not that good again. You heat the ends of the wires with the tip, dip them in the rosin and then spread the tin evenly with the tip of a soldering iron. You'll learn quickly if you try.
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  • #6 4467135
    xamrex
    Level 28  
    joozwa wrote:
    The rosin could be dissolved in pure spirit (not salicylic), possibly in denatured alcohol. This solution is used to cover the tracks before soldering. A saturated solution at room temperature gives good results. Tin grabs until nice :) and what smell :D !! ... Kisses

    So I'll hit this rosin can with a hammer to make it break. Somehow I take out a shard of rosin, put it in the spirit and it will melt ??
  • Helpful post
    #7 4467151
    joozwa
    Level 31  
    xamrex wrote:
    So I'll hit this rosin can with a hammer to make it break. Somehow I take out a shard of rosin, put it in the spirit and it will melt ??

    Rosin crumbles quite easily, depending on the type (i.e. what tree it is made of, the standard is probably pine). You may have to use some drastic methods, but in my opinion, it is worth using the solution :) ... strong, saturated solution, i.e. little spirit to a lot of rosin ...
  • #8 4467171
    xamrex
    Level 28  
    so I just have this piece of rosin (hard) to put in the spirit? And it will dissolve by itself and be liquid?
  • Helpful post
    #9 4467182
    joozwa
    Level 31  
    Yes of course. Just take a lot of rosin for a little spirit to keep the solution strong !!! That is, to dissolve enough ethanol in a given amount of ethanol so that you do not want to dissolve any more ... ;) Such a solution is very practical, e.g. if you have the end of a bleaching (tinning) line, you first dip it in this solution, which penetrates well between the wires, then you can solder and the effect is very good. The same applies to covering the surface of the plate - rosin protects the tracks from corrosion ...
    greetings
  • #10 4467433
    tronics
    Level 38  
    xamrex, when you soldered some smaller or larger wires, wires, etc., especially aluminum ones, you may have noticed that even despite the use of tin with flux, it is not easy to cover the ends of the wires well, and even if you succeed, the tin is often dull, it does not want to stick to the wire. The rosin prevents the air from oxidizing the tin, and at the same time improves the wettability of the surface. A very useful substance, gradually displaced by semi-liquid fluxes.
  • #11 4467545
    Fatko
    Level 18  
    And I will tell you something like that (although it's not HP) ETHOPYRINE (the one recommended by Goździkowa) is very good for soldering. In some cases, it is much better than rosin. It contains salicin acid, which destroys shellac (varnish on winding wires), solder without scraping, CHAINE wires, cables can be soldered without any problems. As for AL soldering, we solder in silicone oil or covered with silicone grease
  • #12 4470643
    joozwa
    Level 31  
    @Fatko I tried the method you quoted (SALICYLIC acid) - unfortunately it doesn't work :( Could you write more precisely how it's done? I just tried to solder the end of the wire by placing it between a hot tin tip and an aspirin tablet. No effect :( ...
    Kisses
  • Helpful post
    #13 4470702
    Fatko
    Level 18  
    We put the wire on the tablet and tin the tablet to act like rosin.
  • #14 4470850
    xamrex
    Level 28  
    joozwa
    I poured the spiritus (I have the usual non-alicylic one) into a small container, then I put the pieces of rosin there .. and I even mixed it up with a spoon and the rosin did not dissolve; [Why ??

    And tell me if I'm doing right:
    If I want to solder two cables, I heat up with a kalafon tip, put the cables there and pull out the cables (so that I do not have these cables in this rosin) and then solder normally. Is it okay?
  • Helpful post
    #15 4471081
    elek555
    Level 37  
    Take it and crush it and pour it into the alcohol. In the summer, I had a request for an urgent soldering of the cable in the washing machine on the eve of my friend's wedding. Of course, due to the lack of rosin, I opened the medicine cabinet, took out the polopyrin, and in the presence of a large family from the USA, I went out to be David Copperfield's guru. (They couldn't grab what CALIFORNIA was for :) to soldering) I thought they were eating nasty smoke, but the connection was fine. :) then I cut it out and soldered it to rosin because the copper cord would soon be left with nothing corrosion by corrosion. Only the eldest aunt was interested that her "everyday" BAYER aspirin has the same dose and "caustic abilities".
  • #16 4471485
    xamrex
    Level 28  
    I crumbled and I don't want to dissolve either; ((
    can heat up?
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  • #17 4471627
    Piotr-gn
    Level 1  
    You need to mix the rosin in the spirit, she muse to soften it for a few days, stirring frequently. DO NOT HEAT IT WILL IGNITE
  • Helpful post
    #18 4473431
    joy_pl
    VIP Meritorious for electroda.pl  
    And I make such a solution from a solvent (for paints, no matter what) and it will always dissolve even one large piece of rosin nicely.
  • Helpful post
    #19 4474294
    szod
    Level 33  
    :arrow: xamrex - rosin should dissolve in the spirit without any problems.
    No need to wait days or heat up. So either you have something wrong with this one
    rosin, or what you think is spirit is not. Check for any
    by chance something like 40% ;) I use rosin as a solvent
    acetone. It dissolves easily and has the added benefit of being very fast
    drying. Much faster than on spirit.
  • Helpful post
    #20 4474521
    elek555
    Level 37  
    Of course it will dissolve in anything that removes resin stains, even oil. But for our purposes, spirit is very good.
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Topic summary

Rosin is a resin used in soldering to improve the adhesion of tin to metal surfaces and to prevent oxidation. It can be applied by dipping the ends of wires into melted rosin or by creating a solution with alcohol (preferably ethanol) to coat surfaces before soldering. A strong solution is recommended for effective results. Users have noted that rosin enhances the wettability of surfaces, making it easier for solder to adhere, especially on difficult materials like aluminum. It is important to avoid heating rosin directly as it can ignite; instead, it should be mixed with a solvent over time. Alternative methods using salicylic acid or other solvents have also been discussed, but rosin remains a preferred choice for many soldering applications.
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