Electronics Forum | Mon Sep 14 23:10:22 EDT 2009 | linseeg
The PCB green mask will become darker after few times IR reflow? What is the reason? Any acceptance spec refer to green mask requirement? Any method to measure the color level for PCB green mask? By naked eye or machine?
Electronics Forum | Wed Jan 14 18:23:05 EST 2009 | boardhouse
konrad, Here are a couple of things that can affect color. 1) Material color is the major, 2) Matte green from Enthone would be different in shad than Matte green from Taiyo. 3) Solder mask is two parts, One the green mask, two the hardner, having t
Electronics Forum | Wed Jan 14 08:43:14 EST 2009 | prkonrad
I did not change my mind, I just said that we sat down with the manufacturer and showed them the 3-4 different color PCBs for one product. They agreed that it is not acceptable... and supply us only from one of their sites. (the different manufacturi
Electronics Forum | Tue Dec 27 07:22:44 EST 2005 | davef
It could be lots of things. You're not helping to narrow those alternatives. So, consider taking a sample to: * An analytical laboratory. * Teachers in the chemistry department at a local university. Kester recommends the following independent la
Electronics Forum | Fri Jan 09 10:06:18 EST 2009 | boardhouse
Hi Konrad, Nothing is ever Clearly one persons issue. Color differences could be caused by many things. 1) Being the solder mask is a two part mix, there is never a 100% guarantee that the color will be the same from lot to lot. 2)the Manufactur
Electronics Forum | Tue Dec 14 11:17:45 EST 1999 | John Thorup
Hello Mike You'll have to be a bit more specific. Do you mean permanent solder mask like the normally green material or a temporary mask like the peelable/washable material? John Thorup
Electronics Forum | Wed Jun 18 08:57:45 EDT 2008 | more_sunshine
thanks for the post... but are you sure that the type of mask i mentioned is photoimageable and as i understood can be removed from desired places (pads/soldering areas) using uv and developer (which i don't know what material is it). and also the
Electronics Forum | Thu Jun 19 04:16:11 EDT 2008 | more_sunshine
actually this is my little problem, i don't know about the material except that it comes in a paste form and it has to be diluted with acetone and it has a green color. i wish that the compounds used to make a solder mask aren't that numerous to be d
Electronics Forum | Wed Jun 18 07:49:06 EDT 2008 | more_sunshine
hi i'm not experienced in creating pcbs but i have good background, and i have a bunch of questions. i have no access to world wide known pcb chemicals but i managed to get a cramolin positiv spray and i don't know if it is still usable or not? (di
