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  1. #11
    Ian Grant's Avatar
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    It was used just below the negative needing a special holder in most cases, so may well have been a big issue with some enlarger designs. Apart from some initial press reports I never saw or heard of it again. I was a subscriber to the BJP by that time and can't remember it ever being written about seriously, and the BJP never misses anything new.

    Ian

  2. #12
    Greg Davis's Avatar
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    Keep in mind that photochromic glass or polycarbonate is activated by UV light. If you don't have any, it won't change. At least the stuff made for opthalmic lenses is UV activated. It also takes a few minutes to fully react and then more to clear and it stabilizes after changing a few hundred times then stops reacting altogether.
    www.gregorytdavis.com

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  3. #13
    nick mulder's Avatar
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    oooh,

    this is a really nice idea!

    you smart farts

    I wonder with a collimated enough light source that it could be sandwiched between a neg and a alt paper like DOP Pt/Pd - for whatever reason POP Pd prints dont have the same tonality and blacks I can get with DOP, but I do love the blocking effect of POP - could be the best of both worlds huh...

    Might be out in the sun again soon
    Cleared the bowel problem, working on the consonants...

  4. #14
    holmburgers's Avatar
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    Yes, the UV light would be a challenge, but I think it's still worth experimenting with. The guy over at photochromic glass said he would send me a sample once he has one. Who knows how long that will be....

    and as nick mulder mentions, alt-processes might benefit the most from this, since they're always out sunbathing!

  5. #15
    Nicholas Lindan's Avatar
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    Photochromic glass/plastic blocks UV even when it is clear to visible wavelengths. This would make it rather useless for alt-process and wet-plate.
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  6. #16
    holmburgers's Avatar
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    Quote Originally Posted by Nicholas Lindan View Post
    Photochromic glass/plastic blocks UV even when it is clear to visible wavelengths. This would make it rather useless for alt-process and wet-plate.
    good call

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