Electronics Forum | Thu Feb 01 07:41:01 EST 2018 | dontfeedphils
Interesting, never heard of using wax as a coating mask. Not sure how well the AR coating would hold up to a hot alkaline wash (unless you have experience with it), but that stuff usually starts to flake off/de-wet if you just look at it wrong. I'm
Electronics Forum | Tue Dec 11 15:31:53 EST 2007 | chrisatae
We accidentally mixed water wash with RMA flux. When the heat was applied during through hole soldering we noticed a problem and we cleaned it as soon as we discovered it. But now there's a discoloration where it was applied. Anyone experience this a
Electronics Forum | Fri Sep 18 09:25:16 EDT 2009 | ysutariya
There's not really a good answer except that I think that the industry wasn't really prepared for such an increased use of white soldermask combined with the importance of using the white as a reflecting surface. Essentially, the resins commonly u
Electronics Forum | Sun Aug 23 11:42:01 EDT 2009 | ysutariya
Hi Dave, I haven't tried the Probimer yet, but the Taiyo ink didn't hold up too well. As a PCB fabricator, finding a white soldermask that has good trace coverage and survives 4X solder immersion (HASL) is like the holy grail of white soldermask.
Electronics Forum | Mon Apr 19 20:49:13 EDT 1999 | Dave F
| Netters, | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | 1. Kester 293 no clean | 2. 2.1 C/s for 30s to 150 C | 3. .5 - .7 C/s for 60s to 185
Electronics Forum | Wed Oct 13 12:54:44 EDT 1999 | Dave F
Mikeh: You can't let that stuff get to your carbon bed. Literally, you can watch your bed die. The clay coats the carbon, entombing it. I've heard talk of using a RO filter as a front-end buffer to the recycling system, but know of no one who has
Electronics Forum | Thu Oct 31 16:40:01 EST 2002 | dragonslayr
Steve- I was once an auto body repairman in an automotive assembly plant. We used lead for dent filler instead of bondo. It was much faster to use. No cure time like a plastic filler needs. Lead was absorbed through my skin from hand filing the lead
Electronics Forum | Wed Nov 26 19:10:05 EST 2014 | caurbach
While I can't directly answer your question, we've had the same problem here occasionally. Our wash parameters are roughly the same as yours. It seems to be correlated to the diameter of the cap (larger caps will balloon while most smaller caps are
Electronics Forum | Sat Aug 01 02:38:50 EDT 2015 | sarason
Is the company near to you, if so walk up to the back door, with a load of cash in hand and a suitable container. Another option get your hands on their formula and have it made up by a chemical batching company. If you can't do that get the MSDS and
Electronics Forum | Wed Jan 31 10:56:23 EST 2018 | dontfeedphils
I'm working on bringing up a new conformal coat process/workcenter and have a few questions I'm hoping someone might have experience with. Right now we're manually spraying both coating materials (1B31 and 1A33 from Humiseal) using HVLP guns. I run
