Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,478   Posts: 1,571,045   Online: 1075
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1

    Join Date
    May 2005
    Shooter
    4x5 Format
    Posts
    186

    Platinum Vs. Palladium

    What are the issues related to Platinum versus Palladium? For example, do they have the same archival properties?

    In the workshop I attended, we used ferric oxalate with with a pt and pd mixture. Are there issues with using only platinum with this sensitizer? Or, is it necessary or advisable to always have some palladium included?

    What are other compounds that can be used for sensitizers, besides ferric oxalate? Is there something that works best, when using only platinum? For example, are there sensitisers that give a platinum print (no palladium included) a warm tone? I see from another thread that it's more difficult to turn platinum compounds into platinum metal.

  2. #2
    scootermm's Avatar
    Join Date
    Jun 2004
    Location
    Austin, TX
    Shooter
    ULarge Format
    Posts
    1,868
    Images
    235
    from the bit of reading and actually printing Ive done in palladium and palladium/platinumit seems common that even a "platinum print" in most circumstances has at least some palladium in it to make it easier to print. from what others have told me making a completely straight platinum print is noticeably difficult.

    in regards to the warm tone v. cooler tone. a noticeable difference can be made by using different developers. I started out doing palladium prints with ammonium citrate as my dev. Then have moved on to pot oxalate as my main developer. The tone in a straight palladium print developed in pot ox was noticeably warmer looking then an identical print dev in ammon citrate. Ive also noticed that in the recent pt/pd prints Ive been doing the tone is alot warmer in the pot ox in comparison to the ammonium citrate. I have settled on the pot ox because Im noticing it seems to work better with my prints.

    Ferric oxalate is the main ingredient in the B&S solution 1 and 2. While in two chlorate is added for the contrasting agent to help with negatives that dont print "right" with a straight ferric ox mixture.
    Clay and mateo have mentioned to me the usage of NA2 as a contrasting agent for pd and or pd/pt prints as well. There is a good article (albeit very technical) about this method on the bostick and sullivan website under the technical papers. (check the sponsors page here on APUG)
    I believe if you were to make straight platinum prints you may be able to get a slightly warmer tone depending on the developer used but from what Ive read the easiest way is to add some palladium to the emulsion mixture to increase the warmness.

    hope that helps.

  3. #3
    Jeremy's Avatar
    Join Date
    Oct 2002
    Location
    Denton, TX
    Shooter
    Multi Format
    Posts
    2,767
    Images
    56
    You can also heat your developer to give you a warmer print. I've been using the microwave, but need to pick up a cheap coffee pot to keep the developer hot.
    Let's see what I've got in the magic trash can for Mateo!

    blog
    website

  4. #4
    Joe Lipka's Avatar
    Join Date
    Sep 2002
    Location
    Cary, North Carolina
    Shooter
    4x5 Format
    Posts
    809
    Pure platinum is difficult to print. Most everyone uses a mixture of platinum and palladium or just palladium. The more platinum added to the sensitizer the cooler the tone of the image.

    Avoid using chlorate as a contrast control agent. The NA2 is far superior
    Two New Projects! Light on China - 07/13/2014

    www.joelipkaphoto.com

    250+ posts and still blogging! "Postcards from the Creative Journey"

    http://blog.joelipkaphoto.com/

  5. #5

    Join Date
    Jul 2003
    Location
    Texas
    Shooter
    Multi Format
    Posts
    3,576
    Images
    27
    Now you guys are confirming what I thought I knew about plt/pld printing..ie the more plt there is the cooler the image tone is. But I think those that have seen the ziatypes I have sent out recently will agree that they have a very neutral to cool tone to them, yet are palladium (LiPd for ziatypes), which has always made me wonder if I was doing something wrong, since I expected them to be a bit warmer...though I know I can use sodium tungstate to warm the image up a bit.
    Mike C

    Rambles

  6. #6

    Join Date
    Jan 2005
    Shooter
    Multi Format
    Posts
    284
    Quote Originally Posted by photomc
    they have a very neutral to cool tone to them, yet are palladium (LiPd for ziatypes), which has always made me wonder if I was doing something wrong, since I expected them to be a bit warmer...though I know I can use sodium tungstate to warm the image up a bit.
    Interestingly enough, I had the opposite effect without using sodium tungstate and thought I was doing something wrong as I expected a bit more neutral tone, my ziatypes always came out very warm.. It turns out my exposures werent long enough, adding a bit longer exposure seemed to bring in the cooler more neutral tones, I dont understand why that is but it happened...
    "Where is beauty? Where I must will with my whole Will; where I will love and perish, that an image may not remain merely an image."

  7. #7

    Join Date
    May 2005
    Shooter
    4x5 Format
    Posts
    186
    Why is it that pure platinum is more difficult to print?

  8. #8

    Join Date
    May 2003
    Location
    Northern Virginia
    Shooter
    Large Format
    Posts
    421
    Neil, I might be using the wrong term but pure Platinum will reverse or solarize in local areas within a print. This will depend on the negative and amount of UV exposure. A drop or two of Pd. will correct that. If your developer has been used for Pd. before you might not get the reversing unless you switch to a new developer.

  9. #9
    Kerik's Avatar
    Join Date
    Nov 2002
    Location
    California
    Shooter
    Medium Format
    Posts
    1,467
    Images
    238
    Quote Originally Posted by Neil Poulsen
    Why is it that pure platinum is more difficult to print?
    Photobum - you have them backwards. Palladium alone can 'solarize'. Adding a little platinum helps prevent that. Pure platinum is more difficult to get a nice, smooth print with because it has a much shorter scale and tends to produce gritty/grainy results - although there are ways (like brush development) that can yield good results. Just the nature of the beast. It is also about 3x the cost of palladium. I've always preferred warmer toned prints, so I've not spent much time trying to make pure platinum prints.
    Kerik Kouklis
    Platinum/Gum/Collodion
    www.kerik.com
    2014 Workshop Schedule Online

  10. #10
    donbga's Avatar
    Join Date
    Nov 2003
    Shooter
    Large Format Pan
    Posts
    2,084
    Quote Originally Posted by Kerik
    Pure platinum is more difficult to get a nice, smooth print with because it has a much shorter scale and tends to produce gritty/grainy results - although there are ways (like brush development) that can yield good results.
    I've made two pure platinum prints in my life, both done with brush development as described by Sullivan and Weese in 'The New Platinum Print'.

    Amazingly I nailed the exposure on my very first print and then immediately made a second. The tones were very smooth (printed on Platine.) But because of the expense I've not made any others. Also as Kerik points I prefer warmer toned prints.

    Don Bryant

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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