Electronics Forum | Wed Jan 10 09:30:23 EST 2018 | buckcho
Hello, which type solder paste are you using?
Electronics Forum | Thu Jan 11 11:29:58 EST 2018 | mohammad
I use this one Chip Quik Inc. SMD291AX250T3
Electronics Forum | Tue Jan 23 02:50:57 EST 2018 | buckcho
8 hours @ 20-50% RH 22-28°C (72-82°F) >4 hours @ 50-70% RH 22-28°C (72-82°F)
Electronics Forum | Sun Jan 07 07:40:31 EST 2018 | mohammad
Hi everybody. I'm new at SMT soldering. I'm using a stencil to print solder paste on PCB. and my board has 0402 components that it make assembling process long so I can't complete a set of board in a day and I have to continue in the next day. what
Electronics Forum | Sun Jan 07 08:46:08 EST 2018 | spoiltforchoice
Your paste should specify a number of times it is OK for various things to happen. The two you might care about are the "Stencil Time"/"Working life", which is how long the paste can be out of the pot on your stencil while you print PCBs. The othe
Electronics Forum | Mon Jul 26 20:31:59 EDT 2010 | engr
When hand placing SMT components what is the working time before the solder paste become unusable (dry)?
Electronics Forum | Tue Jul 02 16:04:08 EDT 2002 | russ
We normally disregard what the "tech" sheets say. A lot of it has to do with your printer settings, prints per hour, placement time, stencil cleaning procedures etc... Just another wrench to throw in, We have noticed lot to lot paste differences al
Electronics Forum | Tue Jul 02 15:50:28 EDT 2002 | blnorman
FIrst, be a doubting Thomas and never trust supplier propaganda sheets, do your own testing. How often do you knead the paste? We have a standing requirement that if the paste printer is idle for 30 minutes, we have a minimum of 4 kneads before pri
Electronics Forum | Mon Dec 17 09:38:27 EST 2012 | cyber_wolf
Why scrap paste if there is no degradation of performance? Do your own study to determine this.
Electronics Forum | Mon Dec 17 08:34:58 EST 2012 | emeto
I would scrap it. As you said part of it is going to be old paste. All manufacturers don't recommend mixing old with new paste because you change the rheology of the paste.
