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  1. Replies
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    Re: Gun Powder Flash

    If Kent has already been playing with potassium chlorate, substituting magnesium for the sugar would produce a viable flash powder.
    However, watch out! It's not stable and can go off if you look at...
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    Re: Gun Powder Flash

    Yes, NI3 is very sensitive. It will detonate if a fly lands on it and I have known it to go off all by itself for no apparent reason. It is tricky stuff. That's why I only made a teaspoon full of...
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    Re: Gun Powder Flash

    :D :D :D

    It was nitrogen triiodide, here, with an occasional soup can filled with black powder thrown in for good measure but, being a theater techie, I had a lot more fun making special...
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    Re: Gun Powder Flash

    If you use modern smokeless powder it will not burn fast enough or consistently enough to use as flash powder. That was established in the second post to this message thread and it was not me who...
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    Re: Gun Powder Flash

    How about Lycopodium powder? You would have to devise an apparatus to aerate/disperse it and ignite it but it sounds interesting on an academic level, anyway.
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    Re: Gun Powder Flash

    If I have allowed you to believe that using gunpowder has no risk then I have misled you. Guilty as charged. Using gunpowder for ANYTHING included the intended purpose IS risky and you CAN get hurt...
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    Re: Gun Powder Flash

    No, it doesn't. Only the container which confines it explodes.
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    Re: Gun Powder Flash

    You're right. I mixed my metaphors, so to speak. Goex (a brand of black powder) is a synthetic substance that is classified as "smokeless" but it is not true smokeless powder.

    Secondarily,...
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    Re: Gun Powder Flash

    Aluminum ought to work but I'm not 100% sure. I have always used magnesium for my stage effects.
    I use a tablespoon full of 50/50 Goex+Mg in an old tuna fish can, touched off with an Estes rocket...
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    Re: Gun Powder Flash

    Use Goex instead of Pyrodex. Make sure you get the "FFFF" grade.

    Pyrodex is not black powder. It is smokeless powder formulated to measure the same as black powder. The grain size is not as...
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    Re: Value of upgrading from CS3 to CS6?

    When I bought my new computer a few years ago, there were a couple of promotions and discounts that I took advantage of.

    First, I work at an educational institution which allowed me to get the...
  12. Re: 'Flashback' trojan estimated to have infected 600K Macs worldwide - What Happened

    Interesting. In the words of Johnny Carson, "I did NOT know that." ;)

    I don't allow Java to run in my browsers and I have "Flashblock" set to restrict the use of Javascript on any website I...
  13. Re: 'Flashback' trojan estimated to have infected 600K Macs worldwide - What Happened

    Remember that "Flashback" isn't really a virus or a worm in the classic sense. It is a TROJAN. It operates differently.

    A virus is malicious code attached to a file or program that activates...
  14. Re: Correction of Lateral Chromatic Aberration

    The version of Photoshop that I use (CS4) has chromatic aberration correction in the camera RAW import dialogue.

    You can scan to DNG format using ViewScan or other scanning software and import to...
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    Re: Alternatives to frames for small show

    Matte the prints, cut a sheet of clear glass to the size of the matte then use tenterhooks, pounded directly into the wall to support the "sandwich" on all four corners.

    Assuming your gallery's...
  16. Re: Color negatives from lab have worm-like marks after scanning?

    I might also add that infrared cleaning can seem to cause as many artifacts as it removes.

    It depends on the film used and the scanner settings.

    Some films don't work for infrared cleaning. ...
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    Re: Darkroom Dehumidifiers

    My darkroom is in my basement. It's about 12' x 16'. It used to be the workshop. I never needed a workshop in the basement so it became a "junk room." After a while, I cleaned it out and decided...
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    Re: How necessary are enlarging eazels?

    Make your own easel. Any size you want.

    Use "MDO" plywood. ("Medium Density Overlay" AKA: "Signboard.") It is plywood that has been sanded smooth then laminated with a sheet of heavy paper and...
  19. Re: Vuescan Win 7 64bit and Polaroid Sprintscan 45 Ultra

    VueScan is compatible with more than 1,800 different scanners. Assuming that Ed Hamrick spent one day testing each one, he would have spent over five years just testing scanners and doing no other...
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    Re: Getting Dust free Negatives

    I just had a bunch of negatives that I was trying to print that were very dusty even though I tried pretty hard to keep them clean. When I tried to print them, I couldn't blow them clean and I...
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    Re: Does LF format film behave the same?

    As to the processing time that seemed out of whack, I assumed that that poster was doing some kind of stand development or something else like that. I have read about stand development and have...
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    Does LF format film behave the same?

    I'm getting ready to order my first batch of film for 4x5. Just a quick question.

    Does a given brand of sheet film behave the same as the equivalent brand of roll film or 35mm?

    For instance,...
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    Re: Cheers from North Carolina

    What about a Graflex or a Speed Graphic?

    They are a lot more portable plus, if you choose carefully, film, film holders and other equipment could be transferable if/when you decide to move up to a...
  24. Re: Hello from Erie, PA. Jumping in with both feet.

    Your point is taken. By "frugal" I meant only for the first couple of tries. I really do intend to get the right stuff.

    I do have the right size trays. I just didn't want to do my first batch...
  25. Re: Hello from Erie, PA. Jumping in with both feet.

    Hey! Thanks, Bethe! :)
    I was looking at all the farms and barns with silos, south of here, along I-79, down through Mercer and Grove City. Fingers crossed, when the weather breaks in spring,...
  26. Hello from Erie, PA. Jumping in with both feet.

    Hi, all! :)

    Just got a Cambo 4x5 monorail. Just the basic model. (SC, I believe.)
    I've been spending some time reading up and studying. Practiced dry-firing the camera a few times. As soon...
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