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  1. #191
    shaz's Avatar
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    Ok guys, i don't understand anything, anymay, i'm gone perfect my english .

    Holmburgers is right when he say that i ask for the aperture like the aperture of a sieve.
    Thank you holmburgers .

    Edit : Sorry PE you give the answer in the message 186....thank you .

    Shaz

  2. #192
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    Here is an example of fluted filter paper and folded filter paper. The description is not entirely accurate regarding the reasons for using one over the other, but the description is accurate on how it looks. The fluted paper, due to the larger surface area passes fluid more rapidly.

    PE

  3. #193
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    Hello everybody,

    Just some little news about my "turtle" autochrome.



    I prepare 60g of dammar. 36g for the recipient.



    I put the dammar gum in 1/2 liter of ethyl acetate.



    I think that my dammar gum got a lot of impurities ...i will see later.

    Next step, i will filter (filter paper for coffee) the dammar gum and dissolve it in the toluene.

    Shaz
    Last edited by shaz; 08-08-2011 at 01:50 PM. Click to view previous post history.

  4. #194
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    Shaz,

    I'm glad to see that you're still pursuing this!
    If you are the big tree, we are the small axe

  5. #195
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    Hello Holmburgers,

    Yes i'm still pursuing.....it's just very long .

    Shaz

  6. #196
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    I totally understand that...
    If you are the big tree, we are the small axe

  7. #197
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    This thread has been a wonderful read. Full points to shaz for his persistence and effort. Have you had any progress since August?

    And I know this idea is fully heretic, but please entertain me: would it not be possible to get colour photographs by replacing the layer of coloured potato starch particles (and black soot) with a sheet of Bayer pattern and then coat the BW emulsion on top of that? I have no idea whether it would be practical to try to obtain Bayer pattern filter layer from anywhere, and I would expect it to cost a lot of money, and have the wrong colours, BUT in theory you should be able to capture a colour photograph, right?
    Last edited by randomm; 12-09-2011 at 05:10 AM. Click to view previous post history.

  8. #198
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    This has already been discussed - and done! It is somewhere here!

    PE

  9. #199
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    That's right!, R Paul used an LCD screen from a digital photo frame (at least, I guess that's like a Bayer filter).

    He hasn't done much with it since, but here's an example, see post #357 -> http://www.apug.org/forums/forum42/7...ochrome-9.html

    My work has been in using slide-film with a photograph of a TV screen placed in contact with panchromatic b&w film. Preliminary results have been promising but no perfect examples have been had yet. Though I've got two loaded right now, and once I get around to shooting and reversal-processing those two, I suspect I will have it made!

    Where are you Shaz?

  10. #200
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    I remember that Apug member htmlguru4242 did a lot of work around this a few years back. I guess the threads serve a purpose to show the problematic nature of reverse engineering.

    Which does not detract from the sheer inventiveness and stubborn energy shown.
    Last edited by Jerevan; 12-09-2011 at 01:13 PM. Click to view previous post history.
    “Do your work, then step back. The only path to serenity.” - Lao Tzu



 

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