Electronics Forum: blue (Page 1 of 33)

Washing of Misprinted PCBs

Electronics Forum | Fri Aug 28 14:00:21 EDT 2009 | kennyg

O.M.G. ! Its blue pad ! ...RE: O.M.G. ! Its blue pad !... or blue balls, assuming there are BGA's on the assembly

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

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

Green vs Blue Soldermask

Electronics Forum | Thu Sep 03 09:00:52 EDT 1998 | James Horn

Can any one tell me if there is a large difference between green soldermask and blue soldermask, in reference to sending the board through the IR reflow oven. - two PCB's (smc parts) are manufactured, the first has green soldermask, the second blue s


Electronics Forum | Thu Jul 23 17:54:29 EDT 1998 | Cunli Jia @ SMTnet

Ben, Thought your message should have been posted to the PCBCE Mart but it does belong to here for now. We have been trying to build up the Blue Book to help answer exactly your question but so far progress there has been slow. If you get any info

'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.

5% color spot in HIC

Electronics Forum | Mon Jul 16 07:33:34 EDT 2012 | amitsindwani

Why to use 5% color spot in HIC if level 2a-5a are considered bad when 10% is NOT blue ? 10% will be NOT blue(or pink) only after 5% is pink. Then why to keep 5% in HIC ?

Optical alignment system

Electronics Forum | Fri Aug 29 14:18:39 EDT 2014 | jana

Thank you for your reply. Are you sure that it should really work as drawn? Or the mirrored ray( blue colour) will go differently because there is a total internal reflection? And the correct path of the mirrored blue ray is like that green ray?

Pick and Place Machines (Blue Book)

Electronics Forum | Tue Nov 01 09:55:07 EDT 2016 | mmjm_1099

Just curious on if anyone knows of a Kelly Blue Book for Smt Equipment out there. We have some older machines and looking to sell or scrap. I would like to know a fair market value if these machines are still being used or if they are now retired. Th

Conveyor belt moves opposite direction

Electronics Forum | Tue Apr 16 10:04:20 EDT 2019 | kgarlapa

Thanks for the reply davef. Can you please let me know which wire should i swap. wires-5set from gearhead box: white, black,yellow, blue,blue.

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