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  1. #41
    Photo Engineer's Avatar
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    Shaz;

    I believe that the words "non smoked" gives us the hint that Autochromes were made with original pure tree sap. The original latex from the reference I cited. Artificial latex manufacture really only started in the middle of the 20th century. Before that, it was all natural products.

    PE

  2. #42
    Eric Rose's Avatar
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    Autochrome Latex, what's this the latest kinky stuff Sheen is into?
    www.ericrose.com
    yourbaddog.com

    "civility is not a sign of weakness" JFK

    "The Dude abides" - the Dude

  3. #43
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    Hello,

    I found this :

    Crepes
    Pale crepe rubber is among the highest quality crepes. Coagulation of this high-quality natural rubber is achieved with sodium hydrogen sulfite (NaHSO3). The clean coagulum is washed and milled. This produces sheets between 1.2 and 1.5 mm thick and 24 cm wide. The washing process removes from the coagulum considerable amounts of the serum constituents which can cause rotting. The sheets are dried in drying rooms for 2.5 to 4 days at 37°C or air-dried for 5 to 10 days on drying floors.

    Excessive temperatures lead to discolored patches in the sheets as a result of oxidation. The sheets are packed as bales and marketed as "thin pale crepe".

    The 10-mm crepe from Sri Lanka is marketed as "thick pale crepe".


    Sheets
    Two different types of sheets are distinguished:
    ADS (air dried sheets)
    Air dried sheets are less common. They have an appearance similar to RSS (ribbed smoked sheets), but are more transparent, as they are manufactured in smoke-free rooms.

    RSS (ribbed smoked sheets) (see Figure 1)
    The fresh latex is diluted to a rubber content of 15 - 16% and coagulated in coagulation tanks using formic acid or acetic acid. Lumps of coagulum are formed after the acid has acted for 3-4 hours. After milling and washing, sheets between 2.5 and 3.5 mm thick, 24 cm wide and 90 or 135 cm in length are produced. The final mill is an embossed mill, which gives the sheets their ribbed structure. Since these rubber sheets are not washed as intensively as crepes, they contain a higher proportion of serum constituents which encourage mold and rotting. For this reason, the sheets undergo an additional preservation process in which they are smoked in smokehouses. The sheets are hung in the smokehouses and dried for a week at temperatures up to 60°C. The smoke resulting from burning Hevea (rubber tree) wood and other organic materials such as coconut husks preserves the sheets. The specific smell of these sheets is caused by the materials used to produce the smoke. The sheets are pressed into bales and wrapped in protective sheets. The surface is protected from oxidation by application of a bale coating solution and talcum.

    I am sure that i need the first one : the crepe.

    I think that i'm gone try with this one first :

    http://www.priceminister.com/offer/b...urnitures.html

    Shaz

  4. #44

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    Hi Shaz,

    There's a french guy in Paris who has recreated the autochrome system - I spoke with him, via email, a couple of years ago. I don't have his details with me now but I should be able to find them when I return home.

    Regards
    Jerry

  5. #45
    shaz's Avatar
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    Hello Jerry,

    With great pleasure .
    Perhaps is it Frédéric Mocellin ?

    http://www.autochromes.fr/mocellinperso/index.html

    Thank you in adavance.

    Shaz
    Last edited by shaz; 03-19-2011 at 05:45 AM. Click to view previous post history.

  6. #46

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    Quote Originally Posted by shaz View Post
    Hello Jerry,

    With great pleasure .
    Perhaps is it Frédéric Mocellin ?

    http://www.autochromes.fr/mocellinperso/index.html

    Thank you in adavance.

    Shaz
    Oui, c'est lui. Je t'envoi s'addresse en message prive.

    Jerry

  7. #47
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    ok , i'm gone write a mail to Frederic Mocellin. There is just one thing, Mr Mocellin don't use a glass for the Autochrome...he used polyester film.
    And i'm not sure, but i read in the Lavedrine Book that they use Primal N580 for the first varnish. I call the society that make this product, but they just sell to industrie.
    .
    Perhpas he can tell me how he dyed the patatoe starch.

    It's a good idea Jerry.

    Best regards

    Shaz

  8. #48
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    When I google "thin pale crepe latex" and look at the images, I see lots of special effects make up. Perhaps this is an industry that uses a lot of latex?

    Check these: http://stageandtheatermakeup.com/effects.htm & http://stageandtheatermakeup.com/mhlatex.htm
    If you are the big tree, we are the small axe

  9. #49
    shaz's Avatar
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    Hello holmburgers,

    The person that tell me to take pale latex crepe say that these product are not good.
    If i put "Pale latex crepe" on internet i find this :

    http://www.google.fr/imgres?imgurl=h...1t:429,r:1,s:0

    It seems like for the shoe sole .
    In the Lavedrine book, Lumière speak about little ball of latex. He wrote :

    caoutchouc : Para Pur Plantation E ( Bergougnon )

    Bergougnon :

    http://fr.wikipedia.org/wiki/Raymond...tin_Bergougnan

    You can read at a moment :

    He(It) makes Établissments Bergougnan a rival prosperous, big company(society) of Michelin



    Shaz

  10. #50
    shaz's Avatar
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    Some friends come at home in a moment...at tomorrow

    Shaz



 

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