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  1. #231

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    Hello.

    I used Lumiere's developer.

    Here is a new Lippmann photograph this time using a homemade albumen plate:

    Click image for larger version. 

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    Kind regards
    Filipe

  2. #232

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    Quote Originally Posted by manalokos View Post
    Hello.

    I used Lumiere's developer.

    Here is a new Lippmann photograph this time using a homemade albumen plate:

    Click image for larger version. 

Name:	llll.jpg 
Views:	84 
Size:	141.5 KB 
ID:	86391

    Kind regards
    Filipe
    Hey Filipe,

    Can you elaborate on how you made your plate? That looks really cool!

  3. #233

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    I was reading an old article on Lippmann photography (here: http://books.google.com/books?id=54M...lbumen&f=false). It details how Lippmann made his silver halide emulsions, but it makes no mention of any sensitizing dyes. It also says that the plates were NOT orthochromatic, so I guess that would imply they were blue sensitive. It also stated that the exposures were extra long to account for the reds -- But how would that work then?

    In other news I was looking at dyes to panchromatize emulsion for Lippmann plates -- I know this has been kind of beaten to death on apug... Does anyone see any problems using erythrosine and methyl violet for green and red sensitization, respectively?

  4. #234
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    Several people have said that they were going to try it. I have seen no data yet.

    OTOH, the Erythrosine works fine and I have posted data on that here.

    PE

  5. #235

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    Making his own plate.. another challenge.
    I'm impressed with the result Felipe obtained !

    My first "ok" plate with a slavich plate :
    Click image for larger version. 

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  6. #236

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    Great to see some results!

    Albumen plates promiss to have much better color rendition than slavich plates, I am still trying to determine the exact procedure.
    Whe I have consistent results I will post more information.

    Kind regards
    Filipe

  7. #237

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    Hello back !


    Lot of trials and errors, lot of reading, helful advices and I realized satisfying plates..

    But first, back on the last plate I posted motnhes ago.
    I find it awful today : no color at all, really sad.

    I made it with slavich plates (PFG-03C) testing the "air interface" technique.
    If you want "so-so" lippmann plates, that's the way !

    Even at Lippmann's era, it has been tested and found not as vivid as those obtained with mercury.
    Today, nothing has changed !


    The process was as following.


    I tested many dilutions and processed by inspection to stop the developpement when it was OK.
    I ended using GP-2 for 8min but diluted 4 times (1 stock + 3 water) only.
    No agitation.
    Washing with gradully concentrated propanol solutions..




    But colors were really disappointing !


    So I devised a little frame to put mercury behind the same slavich 63x63 plates.


    It wasn't easy but rewarding. Just have a look to my last one.. It is shining !!!





    The process isn't OK because lot of parameters should still be fixed.


    I would need some info on slavich plates composition.
    Has anyone ever been in touch with them ?
    They answer only when asking to buy something

  8. #238

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    Nice!

    What is the plastic thing over the plate?
    I was able to achieve fairly decent colors with the slavich plates, although the reds always come a bit orange.



 

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