Electronics Forum: purple solder (Page 1 of 2)

Purple solder mask

Electronics Forum | Tue Oct 19 19:44:19 EDT 2010 | laen

I'm looking to mix up a batch of purple solder mask. Has anyone found a good ratio of red and blue that produces a pleasing purple? 50/50 produces a pretty ugly grape color. Is there a standard ratio most fabs use?

Purple solder mask

Electronics Forum | Thu Oct 21 23:20:05 EDT 2010 | camtechpcb

According to the Trichromatism.Half red and half blue will get purple.But the trichromatism only apply to color light. The red and blue soder mask are coloring material.Both of them absorb light.You mixed them up,so you lose blue and red,and get grap

Black color solder wetting after reflow

Electronics Forum | Thu May 05 01:21:42 EDT 2011 | city4497s

Hi Davef The problem shows up on * random location including component pads * all PCB and different PCB supplier * different solder paste lot * both printing and dispensing process * all production shift * we have only 1 production line It black,

Black color solder wetting after reflow

Electronics Forum | Tue May 03 21:14:19 EDT 2011 | davef

Can we talk some to better understand the scope and breadth of the problem? * From your picture, it looks as if the problem shows-up on some pads, but not others. Is this accurate? * Is this lot related? * Is this related to a few items from a lot? *

Wave soldering problem - strange colour of the solder

Electronics Forum | Fri Jan 19 10:43:28 EST 2007 | jimmyjames

You guys are all joking right?! There aren't any contaminates in your solder, the different colors on the surface are completely normal and even expected. The top layer of solder oxidizes and the structure of the surface resembles crystals, refract

Blue-Film on surface of leadfree Pot

Electronics Forum | Wed May 30 10:09:39 EDT 2012 | brettrenishaw

Recently we have noticed a purple-blue colour film on the surface of the molten solder. It can be cleared when de-drossing the pot. The pot will normally go a yellow/gold colour before it turns purple-blue. Is this most likely an oxide of the tin or

Solder mask

Electronics Forum | Tue Dec 30 08:55:29 EST 2008 | umamaheswaruk

Hi all, I have couple of questions/doubts on solder mask, please clarify. Why green color solder mask is popular when compared to other solder mask (RED, PURPLE, BLUE etc.). Are there any performance issues with other solder mask if I use them.

silkscreen issue

Electronics Forum | Sat Mar 04 13:26:41 EST 2006 | jldowsey

Something unusual happened yesterday, we reflow soldered two boards with white silkscreen legend, and they came out of the oven with purple silkscreen legend. Not tan or brown from overheating, but purple. The boards were reflowed on their normal pr

'Blue solder' residues

Electronics Forum | Wed Oct 27 19:55:01 EDT 2004 | davef

We talked about a similar "Blue Haze ( Not the same as Purple Haze)" awhile ago http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=21401 The BIG difference is that yours is soluable.

Porosity in Good Plating

Electronics Forum | Tue Jul 15 18:44:20 EDT 2003 | davef

Sam says, �The only question remaining to me is that why the failure happened after 48 hours instead of immediate failure after soldering.� Let�s recap: * Had good-looking solder flow. * Passed the initial electrical test. * Failed the later electri

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