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New at PCB etching

Discussion in 'Beginner Electronics' started by SpicyBrown, Feb 9, 2004.

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  1. SpicyBrown

    SpicyBrown Guest

    When tracing out the connections on a regular copper-clad board that
    will be etched with ferric chloride, is it really necessary to use one
    of those "special" ink-resist pens? Can't I just use like a..
    Sharpie?

    Thanks
     
  2. Tim Dicus

    Tim Dicus Guest


    Sharpies work great! Put it on as thick as you can tho!

    Tim
     
  3. SpicyBrown

    SpicyBrown Guest

    Excellent! Thanks, I'm off to try it right now...
     
  4. vladdy

    vladdy Guest

    Basically..sure...You need to go over a couple of times, it 'washes'
    away fairly easily.. another readily available choice is the Staedler
    Mars red [#3 if memory hasn't failed??]

    enjoy..
     
  5. nemo

    nemo Guest

    I use Humbrol enamel intended for model-making. By using a fine "pencil"
    signwriting brush I can flow it on nicely and form smooth-edged tracks and
    pads etc, quite easily. Nitromors paint stripper removes it OK afterwards,
    as long as you don't leave it on long enough to attack the board.
     
  6. When tracing out the connections on a regular copper-clad board that
    Those etch-resist pens ARE Sharpies (with another name on them). Also, I
    stopped using ferric chloride after I discovered ammonium persulfate.
    Unlike ferric chloride, it never becomes opaque -- you can see the PC board
    even when the solution is all-but dead. It's widely available (except thru
    Radio Shack).
    Bryan
     
  7. Bob Masta

    Bob Masta Guest

    Bryan: Many years ago in the shop I worked in then we
    tried ammonium persulphate, but it seemed to attack
    the Sharpie traces. Do you have a special trick to
    avoid this, or have Sharpies maybe changed their
    formula in the intervening decades? Thanks!


    Bob Masta
    dqatechATdaqartaDOTcom

    D A Q A R T A
    Data AcQuisition And Real-Time Analysis
    www.daqarta.com
     
  8. I started using amonium persulfate at the same time I started making boards
    using photosensitive etch resist. I can't recall whether or not I've used a
    Sharpie with amonium persulfate.
    Bryan
     
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