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Solder past KOKI out of date. Can it be reviving

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#71853

Solder past KOKI out of date. Can it be reviving | 21 March, 2014

Hello for all People's .. I have a question. I have a solder past KOKI eco+plus S3X48-406-5 out of date. I have found in the web some articles of reviving solder expired past. one is this, can you comment? http://www.youtube.com/watch?v=TCyki2frm3Q

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#71856

Solder past KOKI out of date. Can it be reviving | 24 March, 2014

Don't do that!

When solder paste dries out, all parts of the flux do not leave. The volatiles leave. Adding new flux messes with the chemistry and %metals and will not perform like new paste. If you can, get your paste in cartridges. It will last longer, but not forever. Store the paste according to mfg recommendations.

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#71858

Solder past KOKI out of date. Can it be reviving | 24 March, 2014

I agree with Jim. Don't do it!!!

The tech from SparkFun [on the YouTube video] is giving you his hobbyist trick, which: * For hobby prototyping will work just fine. * For production work, the process is not in control and should not be considered.

BR Dave

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#71863

Solder past KOKI out of date. Can it be reviving | 24 March, 2014

ok, thanks can you explain me how I can be sure that the past solder it is not more usable? what tests can I do for having the certainty to throw in the trash?

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#71864

Solder past KOKI out of date. Can it be reviving | 24 March, 2014

The "correct" answer is: Use the tests and methods that you used to qualify your solder paste in the first place.

That sounds good but might not be all that practical for practicing assembly-types. Here's something that's not as good, but will give you a good idea of the ability of your paste meet production requirements: * Make a circular hole in a piece of paper with a hole punch. ** A business card is about 12thou (0.30mm) thick ** A 3X5 index card is about 8thou (0.20mm) thick ** Annoying magazine inserts are about 6thou (0.16mm) thick ** Regular paper is about 4thou (0.1mm) thick. * Use the paper as a stencil. * Print your questionable paste on a bare copper board. * Reflow the board as you do normally. * Inspect the solder on the board as you would any other solder connection.

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#71866

Solder past KOKI out of date. Can it be reviving | 25 March, 2014

ok.. thanks you so much.. I will buy new dispenser siringe, and I try to rework... I have a questions on desolder and solder a socket 1366 intel on motherboard. I have a rework station Honton hot air and tornado infrared, but i don't know a temperature template curve for desolder & solder a socket. I want desolder socket from motherboard used to other motherboard with 1366 socket. Whitch paste solder and flux it work fine ? Where i can to find template for socket replace ?

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