Just-Works Colophony Soldering Paste

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Just-Works Colophony Soldering Paste
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Dimensions: 2.17 in x 0.98 in x 0.98 in
Weight: 1.06 oz

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Rate USD$ 1.76 shipped USD$ 1.75 shipped USD$ 1.74 shipped

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Average Customer Review (13 customer reviews) 5

100% of customers would recommend this product to a friend (13 out of 13)

  • 5 star: 9 (0%)
  • 4 star: 4 (0%)
  • 3 star: 0 (0%)
  • 2 star: 0 (0%)
  • 1 star: 0 (0%)

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  • Works well

    posted by NorthernDIY on 15:56:16 G12T 05/12/2013 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: Provides some flux like action for soldering. It's super cheap! Comes Securely packaged. Easy clean up with the right solvents.

    Cons: Leaves a lot of residue. Flux action is on the weak side. Can be a heck of a mess when chipping a piece out of the block.

    Other: Works well for the price, be prepared to vacuum your work table and wipe down with alcohol after to clean up. Make sure you mix it with 99% alcohol and give it some time to dissolve fully. 70% alcohol would be a bad plan (water on circuit boards, moisture in fr4 can be a pain)

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  • Great for making your own Flux, see my review for proper instructions

    posted by Bonejj on 03:37:14 G5T 21/05/2013 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: - A simple and useful product - 2 20g boxes of Rosin - Seems refined well enough for my needs

    Cons: I wouldn't mind if it came in a better container or bigger blocks. I would like to see a 80g option available for purchase.

    Other: Works like it's supposed to, just play with the percentages until you get the mix you want.

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  • Good stuff for diy flux

    posted by nmapper on 15:46:21 G10T 31/10/2012 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: Clear hard rosin for making homebrew flux for soldering. No corrosive residue has been left on stuff I have used it for. I crushed it and dissolved it in isopropyl alchol. All of it dissolved so no random solids in it either!

    Cons: None that I have found yet. I have no way of verifying the claim of low KOH content, but it appears to be fairly low because no corrosion has been noted.

    Other: Good rosin for making your own flux for cheap.

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  • Great stuff!

    posted by BrendanP on 17:54:16 G10T 09/10/2011 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: This stuff is very inexpensive yet effective! What I did was crush it into a powder, the particles being about the same size as granulated sugar or table salt, dissolved that into 100ml of ~99% isopropyl alcohol (I used the 'salting out' method of removing the water) along with about 1.5ml of Glycerin. At first it didn't look or work like my commercial flux, but after letting it sit on my desk for a couple days, it obtained the dark amber color and actually worked *better* than my other flux!

    Cons: None!

    Other: Buy it! It's worth every penny.

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  • Good stuff

    posted by Fenki on 16:11:07 G8T 13/08/2011 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: I use it as soldering flux solved in isopropyl alcohol.
    It can also be used to protect PCB from oxidation. For this I just dissolved as much colophonium in the alcohol as possible. After covering the PCB with this, it dries within 1 - 2 days to a glass-like, solderable cover.

    Cons: It's not too easy to get it out of the paper box. But that's the only con.

    Other: To clean fingers or cloths from colophonium, just use some alcohol - but especially in cloths, it's not easy to clean.

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  • Great stuff for the DIYer

    posted by Kuremyr on 16:29:31 G8T 09/08/2011 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: This is great stuff, I use it a LOT when soldering my electronics projects at home. Just mix it up according to the patent supplied in another review and your on your way to better soldering jobs and better circuit performance.

    Cons: Might not end up being the worlds most powerful flux after mixing but then again that is the reason behind using non activated rosin, less corrosion!

    Other: Good stuff, good price!
    Essential to have in you soldering toolbox!

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  • What a Deal

    posted by petevan1970 on 09:13:33 G12T 08/12/2010 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: I used this to make my own flux. I followed the directions that I found her on the reviews. I crushed up one box, put in a container added about 60% of the volume of rubbing alcohol a little bit of vegetable glycerin and a day later I had the best and cheapest flux I have ever owned.

    Cons: You have to wait to be able to use this as flux.

    Other: If you are like me and like to try and make everything yourself then this is the stuff. I am so pleased with this that I have told everyone that I can about it.

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  • Does what you expect

    posted by dextremeeal on 10:02:06 G11T 08/11/2010 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: Dissolve it in Isopropyl or Ethanol, heat it, let it cool and the alcohol evaporate a bit. You get viscous colophony flux that won't flow away until you solder. With more alcohol, you get a liquid for brushing onto a PCB or sticking wires in.

    Cons: It's a bit hard to dissolve a block, you have to break up the large block into smaller pieces.
    The block is poured into the cardboard box, sometimes you have to peel the cardboard from the Colophony.

    Other: Buy it, much cheaper than "professional" electronics Colophony.

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  • The best deal here for me !

    posted by Otatiaro on 02:39:03 G1T 19/01/2010 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: This is just awesome. You can create a very efficient, very cheap solder flux with this item. Simply add some IPA (isopropylic alcohol) and some drops of glycerin, wait 24 or 48 hours and voilà.

    Cons: You need time for the rosin to melt in the IPA, if you need sodler flux RIGHT NOW ... it "could" be a con. Finding IPA could be a bit hard depending on your location.

    Other: I bought 5 in bulkrate it's even cheaper. Now I make flux for all my friends and they are very happy with it.

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  • Resin in a box

    posted by dansdata on 00:39:40 G10T 03/10/2008 certificated customer

    Involvement Level: Expert (understands the inner workings)

    Pros: Cheap as chips. Looks like pretty high-grade pine resin ("rosin").

    Cons: The resin was poured molten into the boxes, so it's in there tight. If you want to use it as solder flux, you'll need to break it up. If you want to use it on a bow, you'll have to cut or tear the boxes.

    Other: In the olden days, this stuff was used for all sorts of things. These little boxes are presumably meant to be string-instrument bow resin, but you can indeed make solder flux out of it (resin behaves as an acid when melted, but is inert when solid, so you don't have to scrub it off the solder afterwards; that's why normal electronics solder has a resin core). You can also use it for various other purposes - scenting candles, old-fashioned glue or varnish, making DIY chewing gum...
    There's probably not enough for you to use it as hand-friction powder for athletics, though :-).

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