Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 69,926   Posts: 1,522,129   Online: 891
      
Page 2 of 2 FirstFirst 12
Results 11 to 14 of 14
  1. #11
    juan's Avatar
    Join Date
    May 2003
    Location
    St. Simons Island, Georgia
    Shooter
    Multi Format
    Posts
    1,637
    Images
    4
    Man, those folks at Elmer's are quick - here's the reply

    "Elmer's Glue-All is not (and never was) made from casein. It is a compounded synthetic latex based glue. It is mainly polyvinyl acetate (PVA) resin dispersed in water and some soluble polyvinyl alcohol (PVOH). PVA polymer is made from vinyl/acetate monomer that can be manufactured from acetylene and acetic acid. Acetylene can be processed from natural gas or petroleum feedstock and acetic acid from the fermentation of alcohol. The viscosity is built in with a water-soluble thickener. The white color is due to the PVA resin particles dispersed in the liquid, which is water."

    There goes that theory, so far as Elmer's is concerned.

    The print at Gene's link certainly looks a lot like the casein prints on the unblinkingeye link I gave earlier. It's an interesting mystery.
    juan

  2. #12

    Join Date
    Oct 2006
    Location
    Van Buren, Arkansas
    Shooter
    Large Format
    Posts
    2,412
    Images
    101
    I think Carpenters White glue, and Elmers glue-all are two different products that are used for the same gluing applications.

  3. #13

    Join Date
    Feb 2011
    Shooter
    Holga
    Posts
    1
    I went to a now defunct trade school for silkscreen and photo-offset in the 1980's called the Manhattan School of Printing. That was indeed the method used, BUT supposedly Elmers put additives in it that can mess things up. The chemical we used to sensitize the emulsion was sodium bichromate BUT dichromate works too the latter of the two is definitely carcinogenic. I can't find a chemical supplier who has it, been looking the past couple of days. The costs are pennies to the dollar as far as buying kits like Hunt Speedball make, the kits are great but pricey. The screens were stripped with a bleach / water solution in a photographic tray.
    Deadicated.Org is my site, I blog about my adventures in printing. I love this Forum, great info!

  4. #14

    Join Date
    Oct 2006
    Location
    Pasadena, CA
    Shooter
    Multi Format
    Posts
    813
    Images
    9
    Lukas Werth is an APUG member who makes wonderful casein prints, if you're interested. He also has a nice collection on Flickr. His process was also written about in one of the Post Factory Journals several years ago...

Page 2 of 2 FirstFirst 12


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



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