Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 70,536   Posts: 1,544,254   Online: 764
      
Page 1 of 8 1234567 ... LastLast
Results 1 to 10 of 80
  1. #1
    htmlguru4242's Avatar
    Join Date
    Aug 2005
    Location
    Sandy Hook, CT
    Shooter
    Multi Format
    Posts
    973

    I'm getting my "Autochrome" experiments going again ...

    Wow, I haven't been here on APUG in awhile ...

    anyway, I've found myself with some free time, so I've decided to start up work on my Autochrome re-creation idea again. I recently located a source for potato starch, and I MAY have found some dyes that work.

    I'll report back when and if I get anything good that works.

    Once again, if anyone has any ideas ...

  2. #2
    Robert Hall's Avatar
    Join Date
    Aug 2004
    Location
    Lehi, Utah
    Shooter
    ULarge Format
    Posts
    2,040
    Images
    28
    Try...

    John Wood's "The Art of the Autochrome" (Univ of Iowa Press), and "Early Color
    Photography" is about this as well.

    A friend knows Jean-Paul Gandolfo. He teaches in Paris, try to find info on him. I may know somone who has his email, pm me if you need to.

    Regards,
    Robert Hall
    www.RobertHall.com
    www.RobertHall.com/mobile
    Apug Portfolio
    Facebook Profile


    Technology is not a panacea. It alone will not move your art forward. Only through developing your own aesthetic - free from the tools that create it - can you find new dimension to your work.

  3. #3

    Join Date
    Jan 2006
    Shooter
    Multi Format
    Posts
    1,730
    Cool! I always wanted to do that...

  4. #4
    htmlguru4242's Avatar
    Join Date
    Aug 2005
    Location
    Sandy Hook, CT
    Shooter
    Multi Format
    Posts
    973
    well, I've picked up some potato starch, and i'm now experimenting with coating methods, using some notes thatI had from a few months ago. Coating a glass plate with spray adhesive, gently shaking on the starch and then brusing it off lightly seems to get a fairly even coat.

    From previous experiments, about 40% / 30% / 30% Red / Green / Blue dyed starch seems to yeild a nice neutral grey, which seems to be teh right combination.

    The main problem is still finding dyes that work and the right film / emulsion.

  5. #5

    Join Date
    Jan 2006
    Shooter
    Multi Format
    Posts
    1,730
    Do you use carbon black or black-dyed cornstarch to fill in between the remaining spaces after the RGB starch?

    Traditional Autochromes had a salmon color cast to the plate; wonder if that was a function of dye distribution of the potato starches due to the spectral response of the emulsion used on the plates?

  6. #6
    htmlguru4242's Avatar
    Join Date
    Aug 2005
    Location
    Sandy Hook, CT
    Shooter
    Multi Format
    Posts
    973
    Kino, as to the filler in between the space, I have not yet explored this, but I'm going to use carbon black when I do; it's not too hard to make / obtain and is MUCH finer than cornstarch.

  7. #7
    donbga's Avatar
    Join Date
    Nov 2003
    Shooter
    Large Format Pan
    Posts
    2,078
    Quote Originally Posted by htmlguru4242
    Kino, as to the filler in between the space, I have not yet explored this, but I'm going to use carbon black when I do; it's not too hard to make / obtain and is MUCH finer than cornstarch.
    Go here:

    http://www.usask.ca/lists/alt-photo-...sep03/0493.htm

    for a very informative post by Jean-Paul Gandolfo.
    Don Bryant

  8. #8
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,022
    Images
    65
    Carbon black contains oily residues that may affect coating quality and may also affect the emulsion. Please be aware of that fact.

    PE

  9. #9
    Craig's Avatar
    Join Date
    Apr 2004
    Location
    Calgary
    Shooter
    Multi Format
    Posts
    779
    Images
    39
    Wasn't Carbon black used in the rem-jet backing on Kodachrome?

  10. #10
    Photo Engineer's Avatar
    Join Date
    Apr 2005
    Location
    Rochester, NY
    Shooter
    Multi Format
    Posts
    23,022
    Images
    65
    Quote Originally Posted by Craig
    Wasn't Carbon black used in the rem-jet backing on Kodachrome?
    Carbon black is indeed used as the rem-jet on Kodachrome and also on most motion picture films.

    It acts as an antihalation layer and an antistatic layer both.

    PE

Page 1 of 8 1234567 ... LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin