Electronics Forum | Sat Feb 19 10:27:38 EST 2011 | kahrpr
Just a thought. What is the real shelf life of the past? Do manufactures low ball the self life to sell more paste. If the past is perfectly good one day before the expiration date is it still bad one day after I doubt it. Right or wrong I have seen
Electronics Forum | Thu Feb 24 22:32:56 EST 2011 | rstadem
PKannan, Your opinion is contrary to J-STD-005 "Requirements for Soldering Paste". Within that document is included specific requirements for re-certification of expired solder paste. Paste that is expired can be used after a simple viscosity test an
Electronics Forum | Sun Feb 20 20:52:26 EST 2011 | Jacki
I agreed not to ask the shelf life extension to the maker of solder paste. However, somtimes we have no chioce except using expired or used paste. When I have to, try the first PCB as a test. If Ok, just carry on other boards. Unless, use a new solde
Electronics Forum | Wed Feb 23 07:36:22 EST 2011 | scottp
We have a new site that is in the process of starting up and doesn't run much (1 tube every couple weeks). They recently called me about using expired paste. I told them to print a few scrap boards and run them through SPI to verify good print and
Electronics Forum | Fri Feb 18 11:24:52 EST 2011 | pkannan
The following is my opinion on the Shelf life of the Solder paste. Comments are welcome to support or against it. Solder Paste users often have the issue of Shelf life expiry condition. Companies including big MNCs, order certain quantities, but du
Electronics Forum | Wed Jan 30 17:49:41 EST 2002 | davef
PCB never expire, they just become more difficult to solder. [Many shops impose �shelf life� periods for their boards, but they aren�t going to discard the boards if the exceed the limits, unlike they would with some other process materials.] IDENT
Electronics Forum | Fri Feb 01 08:35:18 EST 2002 | gregers
PWB shelf life: HASL---3mth ENTEK-- 2mth Before using expired PWB, it is suggested to go thru HASL or ENTEK angain. Ask your VDR to serve this. Re immersion Au, mostly when the thickness under 3u"(micro pores present), the surface gold will serve a
Electronics Forum | Mon Mar 05 11:04:14 EST 2007 | Yngwie
We are exploring ways to reduce the waste of solder paste. Here are some of the ideas I have in mind: 1) To use paste supplied in Syringe instead of jar. Paste that are opened more than 8 hours will normally be discarded, so we are looking for ways
Electronics Forum | Thu Oct 27 08:38:04 EDT 2005 | jdengler
Simply leave the paste out at the end of the shift for the next days use. Keeping the paste refrigerated just prolongs the shelf life. Even if you are at the expiration date leaving the paste out for 36 hrs won't make any difference. Jerry
Electronics Forum | Mon Jul 26 06:32:58 EDT 2004 | cyber_wolf
Grant, The only thing that you really gain from refrigeration is a couple more months� shelf life. Refrigeration also seems to slow down flux separation. I am not sure how your paste consumption is, but we use ours up way before the expiration date
.gif)
winsouce.jpg)