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Thread: ASA 25 Orthochromatic Dry Plates Now Available!

  1. #1
    Nodda Duma's Avatar
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    ASA 25 Orthochromatic Dry Plates Now Available!

    I am pleased to announce that Orthochromatic ASA 25 dry plates -- J Lane Speed Plates -- are now available for sale through my online store at

    https://www.pictoriographica.com/online-shop.html

    Whereas my original ASA 2 plates gave a look reminiscent of the early 1880s, these new orthochromatic plates are formulated to provide the same results as dry plates of the late 1890s, after the discovery of spectral sensitizing dyes and advances in improving emulsion speed had been made. Coated with an ultra fine-grain, high contrast orthochromatic emulsion, the plates have respond from UV through the visible spectrum up to 610 nm. The high contrast is excellent for alternative process printing or for printing onto multigrade paper at grade 0. The long toe of the characteristic curve preserves shadow details for scanning. As with other primitive processes, the effective speed of the plate will vary depending on actual UV levels. The emulsion has been designed to meter at ASA 25 under early spring northward lighting at moderate latitudes, but expect actual speed to vary by up to a stop or more. Use a yellow filter (No. 2) and reduce speed by ~3 stops to take advantage of the orthochromatic response.

    The original ASA 2 J Lane Dry Plates will, of course, still be available.

    Regards,
    Jason
    Newly made large format dry plates available! Look:
    https://www.pictoriographica.com

  2. #2
    Foamer
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    Ordered a box of 4x5. If they work for me, will also order 5x7.


    Kent in SD
    Qui sedes ad dexteram Patris,
    miserere nobis.

  3. #3

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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    I ordered a box of 5x7. Very happy to see the true ortho plates and at a speed I am accustomed to using with ortho film.

  4. #4
    William Whitaker's Avatar
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    Yay!!

  5. #5
    Nodda Duma's Avatar
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    Quote Originally Posted by Jim Noel View Post
    I ordered a box of 5x7. Very happy to see the true ortho plates and at a speed I am accustomed to using with ortho film.
    Thanks, I started working on this formulation last year. Lots of false starts, tweaks, tossed emulsion ($$), and testing. I'm pretty happy with it and hope you and others like it as well.

    Since this is my own recipe, I'm claiming the distinction of producing the world's latest and newest photographic imaging media. So yeah! Score one for us large format luddites!!
    Newly made large format dry plates available! Look:
    https://www.pictoriographica.com

  6. #6
    Tin Can's Avatar
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    Yes, very interesting.

    I see you have 3A size. I have 3A holders, now I need a back!

    Ordered 25 ASA 1/4 Plate.
    sin eater

  7. #7
    Nodda Duma's Avatar
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    Thanks, Randy! You’re in the cue!

    -Jason
    Newly made large format dry plates available! Look:
    https://www.pictoriographica.com

  8. #8
    Nodda Duma's Avatar
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    By the way, here is a test image which I think shows off the new emulsion really well.

    Click image for larger version. 

Name:	391DFEDD-ECD2-41BD-9C96-BBD6C1A520CC.jpg 
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    Newly made large format dry plates available! Look:
    https://www.pictoriographica.com

  9. #9
    Peter De Smidt's Avatar
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    That looks very good, Jason. Randy might lend me a plate holder so that I can give it a try.
    May tomorrow be a better day.

  10. #10
    Tin Can's Avatar
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    Re: ASA 25 Orthochromatic Dry Plates Now Available!

    I can mail you what you want.

    Or drop in!

    Quote Originally Posted by Peter De Smidt View Post
    That looks very good, Jason. Randy might lend me a plate holder so that I can give it a try.
    sin eater

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