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  1. #1
    Davec101's Avatar
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    Platinum prints and Liquitex Acrylic Gel

    Whilst researching for an upcoming article i am writing I stumbled upon an a pdf written by Richard Sullivan (of Bostick and Sullivan) on platinum printing. It all sounded very familiar until I read what is written below in bold :

    'Speaking of personal choices, my printing procedure is as follows. I coat Arches Platine paper with a Pd/Pt sensitizer (3:2). I use more FeOx than metal: a 4x5 print, for example, is coated with 6 drops FeOx Sol.1, 3 drops of Pd, and 2 drops of Pt. I control contrast not with the sensitizer, but the developer, specifically Potassium Oxalate developer with Sodium Dichromate as the sole contrast agent. I use Kodak Hypo Clear for three clearing baths of 5 minutes apiece. Processing is done in a Jobo drum at 25rpm. After 25 minutes in an archival washer I dry the prints face up on fiberglass screens and then soak each for one minute in an 6% solution of Liquitex Acrylic Gel Medium which increases the Dmax and tonal separation, cools the print color slightly, and also gives the print a slight amount of glossiness.'

    I have never heard of this being used in the platinum printing process let alone used to modify dmax, tonal separation, print color or the glossiness of the final print. Has anyone tried this, I think the article was written some time ago. I should recieve some in the next day or so and will be testing it out.

    --------------------------------------
    Further info on Liquitex Acrylic Gel Medium

    Liquitex Gel Mediums add body to thinner paint for impasto techniques as well as extending colour volume and adding transparency. Gels also add “open time” as they dry slower than thinner films. These mediums also modify acrylics in a variety of ways and tend to improve adhesion and durability.
    Attached Files
    Platinum Printing Editions http://www.dceditions.com
    The Art of Platinum Printing Blog http://artofplatinum.wordpress.com/
    Alternative Photographic Processes blog http://altphotoblog.com/

  2. #2
    Kerik's Avatar
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    Dave - Yes, I've used Liquitex gloss medium and many other post-printing techniques over the years to add a bit of sheen and increase DMax. The short of it is that none of them has really stuck. The best way for me to improve tonality, sheen and Dmax on a pt/pd print is to add one or more layers of gum bichromate.
    Kerik Kouklis
    Platinum/Gum/Collodion
    www.kerik.com
    2014 Workshop Schedule Online

  3. #3
    Davec101's Avatar
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    Quote Originally Posted by Kerik View Post
    Dave - Yes, I've used Liquitex gloss medium and many other post-printing techniques over the years to add a bit of sheen and increase DMax. The short of it is that none of them has really stuck. The best way for me to improve tonality, sheen and Dmax on a pt/pd print is to add one or more layers of gum bichromate.
    Thanks Kerik, do you know of any archival problems associated with using the Liquitex Acrylic Gel with platinum prints?
    Platinum Printing Editions http://www.dceditions.com
    The Art of Platinum Printing Blog http://artofplatinum.wordpress.com/
    Alternative Photographic Processes blog http://altphotoblog.com/

  4. #4
    Davec101's Avatar
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    Quote Originally Posted by Kerik View Post
    Dave - Yes, I've used Liquitex gloss medium and many other post-printing techniques over the years to add a bit of sheen and increase DMax. The short of it is that none of them has really stuck. The best way for me to improve tonality, sheen and Dmax on a pt/pd print is to add one or more layers of gum bichromate.
    I had a thought whilst looking at your new website, is there any chance of being able to convince you to come and teach a gum over platinum workshop in London after or before you do your wetplate workshop in Scotland around christmas time? I am sure there would be some people interested in it down these parts.
    Platinum Printing Editions http://www.dceditions.com
    The Art of Platinum Printing Blog http://artofplatinum.wordpress.com/
    Alternative Photographic Processes blog http://altphotoblog.com/

  5. #5
    Kerik's Avatar
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    Dave AFAIK Liquitex Gloss Medium is archival and non-yellowing, so I don't think there are any issues using it for pt/pd prints.

    Unfortunately I had to cancel my trip to Scotland this year. It was to be in July not December, though. I imagine trying to do wet plate in Scotland in December would be a huge challenge! I will be returning to Scotland in the summer of either 2011 or 2012. Perhaps we could work out something then...
    Kerik Kouklis
    Platinum/Gum/Collodion
    www.kerik.com
    2014 Workshop Schedule Online

  6. #6

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    Quote Originally Posted by Davec101 View Post
    I had a thought whilst looking at your new website, is there any chance of being able to convince you to come and teach a gum over platinum workshop in London after or before you do your wetplate workshop in Scotland around christmas time? I am sure there would be some people interested in it down these parts.
    Now, that's really something to envy about!!! I really want to host more of the master practitioners / photogs here in Istanbul (we had Sandy King and Keith Gerling before...), unfortunately the funds and interest are both low...

    BTW, welcome back Kerik!!!

  7. #7

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    Hi Dave,

    I've been experimenting a bit with acrylics. My painter friends all swear by Golden acrylics. They have a good web site and a bewildering variety of mediums, which I'm slowly getting to know. I'm trying both brush-on and spray-on. Net at the moment is definite improvements in dMax and depth of the print, at the cost of a tendency to look a bit plastic, which is not the way one normally thinks of a Pt/Pd print...
    Good quality acrylics are thought to pretty archival, I understand, and probably protect the paper from atmospheric chemicals. However Golden recommend a removable UV blocking varnish over the acrylic, as the acrylic surface can pick up dust and fingerprints and the varnish can in theory be removed and redone by a restorer - let's hope any of our prints are thought to merit such attention! Have not got as far as trying varnish yet, so don't know what the final look would be.

  8. #8
    Kerik's Avatar
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    Quote Originally Posted by Loris Medici View Post
    BTW, welcome back Kerik!!!
    Thank you, Loris!
    Kerik Kouklis
    Platinum/Gum/Collodion
    www.kerik.com
    2014 Workshop Schedule Online

  9. #9

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    I've simply post-sized a few kallitypes with 5% gelatin and they really look pretty damned good if I do say so myself. Cheap n easy.

  10. #10

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    Quote Originally Posted by Colin Graham View Post
    I've simply post-sized a few kallitypes with 5% gelatin and they really look pretty damned good if I do say so myself. Cheap n easy.
    Indeed, that could work - in order to increase dmax - also. But the "thing" with polyurethane and/or acrylic coatings is that you can exhibit the prints w/o glass; that's both good in terms of aesthetic and in terms of cost... You can wipe the surface with a moist (and clean) piece of cloth, "since the coating is impermeable". Therefore, there's definitely a potential in using such coatings - as long as you can live with the "unnatural" gloss.

    Regards,
    Loris.

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