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I am looking for a good method to clean used solder paste needles immediately after usage. I know they are for one time use, but at this moment I have to clean the needles.

Currently, I clean them in diluent using a thin wire to get all the paste out. Is there a better way to clean used solder paste needles?

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  • \$\begingroup\$ Have you tried to intake up a small amount of alcohol and seal tip then return to fridge? Then release on 1st use. \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Nov 26 '17 at 16:56
  • \$\begingroup\$ No, I haven't. Please corect me if I misunderstood: after usage, I dip the needle (which has solder paste inside) in alchool, seal the tips and refrigerate? So this way, the paste will not harden and I could reuse the needle right away (no cleaning necessary) when I need it? \$\endgroup\$ – Cristian M Nov 26 '17 at 17:42
  • \$\begingroup\$ That's what I'm thinking .. intake some fluid.... to prevent air leakage to paste for some short period. Or use compatible liquid flux from a spoon. Then expel when using. \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Nov 26 '17 at 17:57
  • \$\begingroup\$ Thanks! I will try your suggestion. You could post the comment as an answer so I can mark it. \$\endgroup\$ – Cristian M Nov 26 '17 at 18:32
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In order to seal the solder paste from air try to intake a drop of liquid flux into the needle, seal tip then return to fridge. Then release flux on 1st use.

You might also keep needle in a container permanently mounted to support needle with a small amount of liquid flux to prevent air exposure during use between applications.

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