Color code for PCB

Discussion in 'General Electronics Chat' started by nerdegutta, Jan 3, 2011.

  1. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    2,515
    785
    Hi.

    Almost all factorymade PCB's are green.

    Does anyone know the colorcode?
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    I wasn't aware there was one. My board stock has a wide variety of colors.
     
  3. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    2,515
    785
    Including mine, and I want to experiment with color, so in the end, they have the same color.

    Thought I read somewhere that factory made boards are spray painted.
     
  4. marshallf3

    Well-Known Member

    Jul 26, 2010
    2,358
    201
    Green is the color of most quality epoxy-glass FR4 boards due to the resin, if they're yellow they're plain phenolic stuff.

    This of course has to do with the actual PCB substrate itself, they can soldermask, silkscreen or paint anything they want on top.
     
  5. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    2,515
    785
    I got 3-4 different types of PCB, and the one I'm most satisfied with is nearly transparent, with a green-ish touch.

    The rest i brown and boring.

    Thought I would try to spray paint on a green layer.
     
  6. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,676
    899
    A lot of the color you see on factory PCB's is the conformal coating. That is, it's a sprayed on color. They are also usually at least double-sided.

    John
     
  7. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    2,515
    785
    Yes, but what is/where can I find the color code?

    Of course I could bring a board to a paintshop and make they use their device to scan and get the code. But I'd rather get the code first.
     
  8. marshallf3

    Well-Known Member

    Jul 26, 2010
    2,358
    201
    What? You're wanting to paint boards green?
     
  9. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    Usually on the green board the inner matterial is yellowish fiberglass, and the green is the solder mask. Last time I looked on my PCB fabrication company´s website, they had 5 different board materials and 7 solder mask colors.
     
  10. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    2,515
    785
    Yes, I want to try to paint the boards green.

    Have I crossed the line to insanity?:)
     
  11. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,676
    899
    Absolutely not. PCB's are an art form. You will notice some manufacturers make a point about the color of their boards. John
     
  12. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    Good example are computer motherboards, every brand uses its own color and I haven´t seen the plain green in a long time.
     
  13. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    Well, yeah... [​IMG] Huh, do I have to answer that one[​IMG] But to stay on topic. Protecting your PCB from oxidation is not a bad idea. But use a protective coating that can be soldered. If you go to ELFA (ELFA is the electronics pusher used by Jens and I) Check out item 80-802-29, 80-794-93, and 80-815-49. All this spays forms a transparent and flexible film.
     
    Last edited: Jan 3, 2011
  14. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    2,515
    785
    At least I'm still allowed to etch my boards at home... :rolleyes:

    Now we're talking. I thought of this type on the solder-side, and green-ish on the component side. I haven't converted to SMD yet, but it will come. Eventually.
     
  15. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    If you need to do rework on you board any standard paint, varnish, or lacquer. Will make such job very messy. But I have used the spray mentioned above with success. If you only create single layer cards. It should do to just cover the solder side.
    And thanks for telling the forum about my problems at home. I gave you this information in PM. PM is a abbreviation for Personal Message. Consider your hands smacked:p
     
  16. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,676
    899
    Paint (what is it chemically?), varnish, enamel (any type), and silicone will make it difficult. Anything opaque (e.g., paint with TiO2) will be difficult to solder through. Lacquer is a different story. The solder-through lacquer commonly used by hobbyists is an acrylic lacquer. Most transparent acrylic lacquers with dyes in them, not heavy pigments, should be quite similar, but may not be readily available in all countries. I have no experience with trying to solder through nitrocellulose lacquers or other lacquers. That said, given the choice, I solder first and coat second. I consider being able to solder through is only for repair.

    John
     
  17. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
  18. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    Not sure if this will help or not:

    Testors 1601 Transparent Candy Emerald Green (3 oz Spray Can) - Matches a lot of boards when fixing traces.

    pebeo vitrea 160 "Mint" 37 (needs Airbrush or small paintbrush, comes in bottle) This is a tad darker but still matches the Testors.

    Darker green is:
    pebeo vitrea 160 Tea Green 15

    The vitrea paints WILL also act as a solder mask, so if you make a toner transfer for the pads only, then airbrush those on, let it dry for a day, then wash off the toner w/water (not using acetone/MEK/Laquer Thinner/etc), you will have shiny copper pads. It's a bit of a pain, and I've only done it once.

    I also have the Vitrea pepper red 04 Which matches the sparkfun colored red boards.

    Vitrea 160 Many Colors

    Testors doesn't work very good as a solder mask, FYI.

    On the bright side, your idea isn't so crazy that somebody hasn't already tried it and published the exact colors! :D
     
  19. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    2,515
    785
    You're welcome.:)

    Oh, thought it was Past Midday or Post Mortem. Need a list of all this abbreviations.:rolleyes:

    Next delivery from ELFA will include what you recommended. (This is the second time.:))


    Thanks this is very useful. Transparent Emerald Green it is.
     
  20. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    The other Vitrea 160 colors I mentioned are also transparent. Better results, but a bit more money and not as easy to apply unless you have an airbrush or HVLP gun handy.

    The hard part is getting those colors OFF once they are cured. Real dental picks work good, but the "cheapy" 'electronic picks" that are shaped like dental picks for $5 tend to bend or dull and ruin the board before they scrape off the coating.

    Next trip to the dentist, ask him for a couple picks (maybe just one), they are around $20 each or something, I forget, but nice and sharp and un-bendable.
     
Loading...