ns bought a "Solder Paste". That is in quote due to the fact that I"m no really sure if it"s a Solder dough itself.

I researched around what Solder dough is and, by definition, is characterized as a mixture of tiny solder spheres through flux. It"s additionally grey-like in color since it has tiny solder spheres.

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So, it can be directly applied to the pads that the PCB and perform reflow soldering afterwards.

But here is the actual product i bought:

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As you deserve to see, it"s brown-ish in color and also I don"t think there are tiny solder spheres in there.

And the direction in making use of this is to put ample amount on the pads then apply solder through iron or torch

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So my concern is, is this yes, really a solder dough or just flux?How deserve to I use this, then?


soldering flux dough
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edited Jun 9 "17 in ~ 9:11
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pipe
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J. A. De la PeñaJ. A. De la Peña
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This is not the ingredient to usage to solder electronic boards, this is for pipes fittings, a flux come be used in enhancement to stick of solder.

Electronic boards need either "flux-cored solder" because that hand use, or "solder paste", i beg your pardon is a mixture of little solder balls in a perfect flux, for maker use.

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This flux is likely to be too aggressive to leaving on a board, and also will call for cleaning, otherwise it"s most likely to damage the board. The flux offered in flux-cored solder or solder dough is draft to it is in compatible with the materials on a PCB, and it"s typically safe to leave the residues over there indefinitely.


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answer Jun 9 "17 at 9:04
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Neil_UKNeil_UK
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This appears to be an Asian-English thing- call flux "soldering paste" or even "solder paste". Occasionally the word "cream" is in there.

I"ve viewed it in China, Hong Kong and Taiwan, and also this "soldering paste" is from the Philippines.

Here is some Asian-origin (real) solder paste:

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As you have the right to see, the alloy (Tin 63%/Lead 37%) is specified and also the ball size 25-45um diameter. Most lead-free alloys are mostly tin, with a bit of copper and possibly other steels mixed in. Over there is a tin-bismuth alloy for the large spenders. It looks choose a grey paste and also under the microscope you can quickly see the it is composed of small balls in a matrix of flux.

What you have actually is flux of part unknown kind (although it"s stated as non-corrosive for this reason at the very least it (probably) isn"t the common highly acidic plumber"s flux). You have the right to stick multimeter probes into it and also see if that is conductive.

Typical classes of fluxes are RMA (Rosin mildly activated), "no-clean" and water soluble. Lock have various characteristics, though for non an important circuits it may not issue which is used.

Here is a typical flux (RMA) native the exact same manufacturer:

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As you deserve to see, it"s a translucent gel-like material with a yellowish tint, no dissimilar to what you have actually (however given the recommendation on the can to "torch" I would certainly be wake up to shot yours ~ above circuits - it might be similar but have actually impurities that would certainly be electrically conductive, because that example).

Solder paste photo (from Adafruit):

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Edit: native the comment/link by
JRE, the flux you have is claimed to be perfect for beer-selection.com:

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"Noisy set" indeed. If you use acid flux at mains voltage (as a hapless client of mine when did) the "set" will certainly be according to from every the electrical arcing.