Electronics Forum: kester and 971 (Page 1 of 3)

voc free flux

Electronics Forum | Wed Nov 12 10:45:12 EST 2003 | johnthor

Absolutely, read the manufacturers MSDS. You do have it, don't you? We use Kester 971 and it reads Waste Disposal Methods: According to local regulations. Considered biodegradable. We did take the precaution of informing the local authorities and

No-Clean or water

Electronics Forum | Fri Jun 08 14:19:35 EDT 2001 | Spanky

Jake, The No-cleans on the market, to me, still aren't as good as OA and water wash. But they have gotten better. The type of No-Clean flux and paste to use really depends on each individual assembly, the machines used, settings, and the environme

Imm Silver and Voiding

Electronics Forum | Fri Jun 23 10:10:15 EDT 2006 | Gman

Some amount of voiding was always seen on sites where solder paste is printed. These voids are much smaller. However the site where a flip chip is flux dipped has never had problems with voiding. Macro voids (and huge ones at that)across the board s

Wave flux and profiling

Electronics Forum | Tue Dec 19 16:26:24 EST 2006 | samir

Grant, Newer lead-free fluxes have 6%-10% solids content - more activator, therefore leave more "visible" residues. Old technology tin-lead fluxes got down to as low as around the 4%-6% range (I'm going off memory, so me might be wrong)... You'll

Material Ageing and Storage

Electronics Forum | Thu Feb 22 10:32:25 EST 2001 | CAL

SCOTT- We do solderability testing for the electronics industry using a Multicore and Kester Wetting Balance testers. The standards we test to is IPC J-STD 002 for components and J-STD 003 for PCBs. There is also a system called SERA we co-developed

Ionic testing and No-Clean flux

Electronics Forum | Fri Feb 04 09:23:21 EST 2000 | Casimir Budzinski

If No-Clean flux does not need to be cleaned, then why do I get readings of up to 27(ug NaCl/sq in) on boards that are not washed, up to 23.4(ug NaCl/sq in) on boards washed with DI water only and from 1.2 to 10.1(ug NaCl/sq in) on boards washed with

Discoloring of Soldermask and silkscreen

Electronics Forum | Mon Apr 12 19:28:26 EDT 1999 | Tom B

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 C 4. 1.5 C/s u

Kester R562 and using lead free components

Electronics Forum | Fri Jul 06 12:11:34 EDT 2007 | james

We are starting to see issues with using Kester WS R562 with lead free components. The joints look grainy on almost all of the 0402'2 and other small components. Some of the solder does not solder to the terminations. These are hybrid boards which

Kester R562 and using lead free components

Electronics Forum | Fri Jul 06 12:39:01 EDT 2007 | blnorman

What's the metallization on the board? We use an immersion tin board and had to increase our profile to successfully solder.

Foam fluxer maintenance, storage and cleaning

Electronics Forum | Sun Nov 08 17:04:26 EST 2015 | ttheis

Thank you very much for sharing this information. It is difficult to gain knowledge in this area independently. I'll contact Kester for information on adjusting the flux density and which "thinner" to use since I am using their flux. I really like

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