Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,290   Posts: 1,535,406   Online: 776
      
Results 1 to 7 of 7

Thread: Coper, anyone ?

  1. #1

    Join Date
    Aug 2006
    Location
    Windsor, UK
    Shooter
    Multi Format
    Posts
    182

    Coper, anyone ?

    My current large-format pet project involves electronics, microcontrolers, sensors and various other gizmos. So i get to make my one pcb (printed circuit board).
    Lets look at the requirements:
    + Epoxy + copper layer
    + Light sensitivive emulsion
    + Circuit layout laid over it
    + Expose to UV for some time...
    + Develop in some wierdo chemical
    + Wash, hang out to dry (almost)

    Sound familiar ? Yes it does.

    So my current pet project got sidetracked while I study how I could contact print a photograph on a copper plate. Anyone tried that before ? what kind of density/tones can I expect ? what sort of exposure time ?
    What about protecting against corrosion ? Any laquer/varnish idea ?

    Fun !

  2. #2

    Join Date
    Mar 2007
    Location
    Shropshire, UK
    Shooter
    Multi Format
    Posts
    829
    Images
    7
    There is a book called "The Creative Darekroom Handbook" by Chris Wainwright, ISBN 0-304-34333-1. Here he experiments with all sorts of techniques including printing on pcb boards.

    He doesn't say much (not worth buying the book for it!) but contact prints some lith positives onto copper PCB boards and developes in ferric chloride.
    His pictures were therefore two tone only, etched or not etched...

    I personally didn't find them too inspirational and never attempted it myself.
    The copper was a nice colour, but the underlying fibreglass board was not, being an insipid green. The two colours didn't complement each other at all...

    Streve

  3. #3
    Michel Hardy-Vallée's Avatar
    Join Date
    Apr 2005
    Location
    Montréal (QC)
    Shooter
    Multi Format
    Posts
    4,351
    Images
    132
    Using film since before it was hip.


    "One of the most singular characters of the hyposulphites, is the property their solutions possess of dissolving muriate of silver and retaining it in considerable quantity in permanent solution" — Sir John Frederick William Herschel, "On the Hyposulphurous Acid and its Compounds." The Edinburgh Philosophical Journal, Vol. 1 (8 Jan. 1819): 8-29. p. 11

    My APUG Portfolio

  4. #4

    Join Date
    Sep 2006
    Location
    Victoria BC
    Shooter
    4x5 Format
    Posts
    1,183
    Images
    107
    This just goes to show that an original idea is completely impossible. I was thinking about doing this just a week or two ago, and I was thinking "haha, I can do something neat and original."

  5. #5
    Michel Hardy-Vallée's Avatar
    Join Date
    Apr 2005
    Location
    Montréal (QC)
    Shooter
    Multi Format
    Posts
    4,351
    Images
    132
    Quote Originally Posted by walter23 View Post
    This just goes to show that an original idea is completely impossible. I was thinking about doing this just a week or two ago, and I was thinking "haha, I can do something neat and original."
    You know, when I had my first film camera, I was thinking myself all smart because I kept saying to people that I was doing "analog photography." One day, out of self-importance, I googled the word, and of course discovered APUG. I was humbled but very pleased...
    Using film since before it was hip.


    "One of the most singular characters of the hyposulphites, is the property their solutions possess of dissolving muriate of silver and retaining it in considerable quantity in permanent solution" — Sir John Frederick William Herschel, "On the Hyposulphurous Acid and its Compounds." The Edinburgh Philosophical Journal, Vol. 1 (8 Jan. 1819): 8-29. p. 11

    My APUG Portfolio

  6. #6
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    22,972
    Images
    65
    Cuprous oxide is light sensitive and can be developed in an acid developer to form a metalling copper image. It has a speed and sensitivity similar to Kodabromide and a similar tone scale.

    The image is unstable and would have to be toned somehow.

    PE

  7. #7

    Join Date
    Sep 2005
    Shooter
    Multi Format
    Posts
    28
    Instead of printing a "normal" image on the board, why not etch it? There's a book on high-contrast photography. Look at some of those pictures and transfer the ideas onto an etched copper board.

    BTW, Fiberglas isn't an insipid green. It is a very beautiful insulator.



 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin