MG Chemicals Liquid Rosin Flux, 100ml (CE04594)

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For leaded and lead free soldering. Fully activated. Offers superior fluxing ability. Instant wetting. After soldering, the rosin residue is non-corrosive, non-conductive…

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which liquid solder flux would you recommend? For normal not SMD. I sometimes get dry joints or little bulbs on my joints, so I want to try extra flux.

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Looks like a high-quality solder rosin flux.

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Hey @Sonia116137,

We have multiple Flux/Rosin options available here on our website!

I hear good things about all of them, but this one seems to be the highest value, quantity-wise.

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Hi Sonia

This is probably technique more than the lack of flux.
The “little bulbs” could be not enough heat due to a cool iron or iron not big enough for the task. There are other reasons but heat is the most common.
Solder “wire” of different diameters have 5 cores of flux within which is usually adequate for normal electronic type soldering jobs.
There have been volumes produced on the art of soldering so you could benefit from some research. Be careful of some UTube offerings. While some are quite good there is a lot of garbage out there so a bit of intelligent filtering is needed.

Nothing replaces practice
Cheers Bob

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Hey all,

Great tips from Bob. Below is a good video for soldering tips, even if you already have some experience.

We also have a Soldering 101 guide that may interest you. It’s a couple of years old at this point, but I think it’s safe to say solder tech hasn’t changed drastically since 2016.

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Hi Zach
This looks like one of the better presentations.
One comment I would make though. The presenter at one stage inserted a component (resistor) into the board He then soldered the component BEFORE cutting the lead. This should be a no no. Cut the lead first. Doing this the extra heat sinking the unwanted part of the lead exhibits and secondly it will provide a protective layer of solder over the exposed wire ends.

The rest looks pretty good and Sonia could do a lot worse than follow these instructions.
Cheers Bob
PS. One of the main things if Sonia is going to play some more with this sort of thing is get a quality temperature controlled soldering station.

Also. This video shows solder with a single core of resin flux. Now I have not seen that in the electronics field for about 55 - 60 years. Solder these days has 5 cores for a more even distribution. Note Plumber’s suppliers might still have single core I don’t know for sure.

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Hi Sonia,

I like these flux pens: CircuitWorks No-Clean Flux Dispensing Pen | Buy in Australia | CE04596 | Core Electronics

Any ‘No clean’ solutions I find are amazing :smiley:

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I think I put this in the wrong post. Reproduced here.

Hi All
Just a bit curious here.
For “normal” soldering jobs encountered it this business for many many years I have found the cores (5) in various diameters of 60/40 solder “wire” quite adequate. Any additional flux would just make a mess.

Don’t get me wrong, I have used and seen used liquid rosin flux especially where larger volumes of copper or brass have been involved and a gas flame used as the heating medium. One case comes to mind in TV transmitting antenna systems where copper pipe up to some 4.5" in diameter is soldered into large brass castings in the construction of power splitters. Another is making your own solder wick. Warm a container of rosin in a tub of hot water and soak some copper braid in it for a couple of hours. Result, ready to order solder wick, make whatever size you want.
Another use is to tin wire using a solder pot method. This would be more a commercial operation where a large number of wires have to have the ends tinned either manually or by some automated process

This liquid might be used with solder paste which I think is used for surface mount components. I have never used it so am unaware of flux requirements.

I apologise if this query seems a bit stupid but I am just interested in just what the average hobbyist would do with 100ml of liquid, that is a fair quantity.
Cheers Bob

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I agree, an average hobbyist would be doing very well to use up 100ml of flux! Maybe we should change the description and call this a lifetime supply. :slight_smile:

It seems like this is the smallest quantity available from this supplier without moving to the pen form so I would imagine this is simply an alternative for people who don’t like using the pen variant or want to use an alternative application method.