Electronics Forum | Wed Dec 06 15:46:57 EST 2006 | SWAG
Check your expiration/storage/shipping conditions. We've been using EP256 for a couple of years and it works excellent. Never had any problems with it.
Electronics Forum | Wed Oct 22 12:13:18 EDT 2008 | brismittr
A no-clean paste with an above average amount of halides should do the trick. Kester EP256HA is a good choice for this application if you are using a leaded alloy (Sn63 or Sn62).
Electronics Forum | Wed Dec 04 12:42:04 EST 2019 | dunks
We currently use Kester's ep256 as well and it seems to be a bit more grainy than one would expect from lead, especially if the temperature is too low. That paste says it's specialty is being robust over a wide range of profiles and stencil conditio
Electronics Forum | Tue Jul 06 10:46:12 EDT 2004 | blnorman
We have now switched to Kester EP256. During our solder paste evaluation, resistance to humidity was one of the selection criteria. We printed multiple boards, then exposed them to 85�F/65% RH. At 30 minutes, 1 hour, 2 hours, and 4 hours exposure
Electronics Forum | Tue Aug 17 11:24:04 EDT 2010 | namruht
I have a question that has been discussed many times, but is always good to get some new insight. We have lots of issues with our no clean process. We use a Kester EP256 solder paste. I would just like to get some general tips on how to get rid of mi
Electronics Forum | Wed Dec 04 08:00:57 EST 2019 | kylehunter
Thank you both. We are using EP256 Solder Paste Sn63Pb37 no clean from Kester. I attached our profile as well as Kester's target profile. We used a populated demo board for the profile. We tested along the width, and was less than a 2c difference.
Electronics Forum | Tue Dec 17 14:11:43 EST 2019 | kylehunter
Haven't run those boards again, so haven't had the issue.. Since it seems like we may want to start using more aggressive flux based paste soon, what are some good choices? Ideally I'd like to stay with Kester, since they are readily available. EP2
Electronics Forum | Thu Apr 21 19:41:35 EDT 2016 | adamjs
Hi, is there some sort of gas (certainly refrigerated, possibly pressurized?) in which printed boards can be stored to extend the allowed time between SMT paste printing and placement? Or other technique for achieving this? Background: we're a smal
Electronics Forum | Mon Oct 12 10:26:52 EDT 2015 | eniac
My greetings to all. Time to time I receive the next results of modems soldering: http://i.piccy.info/i9/71ae4c358c6e4bc3f1cbf140495bc437/1444660170/135005/872954/GL868_7.jpg or http://i.piccy.info/i9/d1181be142e285a39b49b81d37bde72a/1444660270/1
Electronics Forum | Fri Nov 06 08:50:07 EST 2009 | jeffreyj
adlsmt - I do apply paste (Kester EP256) by hand to the boards now with 5 mil thick stainless steel stencils. A few of the parts almost always need rework, though, either because I didn't place them accurately or there's too much paste, or it got sme
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