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  1. #11
    shaz's Avatar
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    Hello c.d.ewen,

    For the patatoe starch, i found the seller in France. Now i have to do a sort; by "lévigation" or with a sieve of 15 microns first.

    In the book for the first varnish you need :

    -pale latex crepe
    -benzine
    -résène ( résène is from the "gomme de dammar" ) i think in in english you say "gum of dammar" . But you need just the wax (résène) of the "gum of dammar". To take the wax you put the "gum of dammar" in the "acétate d'éthyle".

    Pale latex crepe is not referenced in the book....someone tell me .

    For the second varnish something make me afraid..because you need to found "nitrate de cellulose" = nitocellulose ????

    Shaz

  2. #12
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    When reading references about autochrome plates, I saw "pine pitch" mentioned - Damar Gum could well be the material that was used. You should be able to purchase small quantities from a traditional artist's supplier such as Cornelissen. Damar will dissolve in pure turpentine (not a substitute).

    "nitrate de cellulose"
    would be cellulose varnish - Also available from an artist supplier or anyone selling automotive paints. Very flamable stuff, but not explosive

  3. #13
    shaz's Avatar
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    Hello paul_c5x4,

    Yes, the damar gum is mentionned in the book of B.Lavédrine. In this book you can read that this gum is dissolved in "acétate d'éthyle"...i don't know the good word in english. .

    I have the answer of an enterprise which sell varnish and they said to me that all the cellulose varnish are not transparent....they say to take a polyuréthane/acrylique varnish. Now i have to know how is made this varnish...imagine that it dissolve the first varnish .

    Shaz
    Last edited by shaz; 03-07-2011 at 04:38 AM. Click to view previous post history.

  4. #14
    shaz's Avatar
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    I found on internet a cellulose varnish without color.

    Shaz

  5. #15
    paul_c5x4's Avatar
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    "acétate d'éthyle"...i don't know the good word in english.
    From brenntag.be CAS No: 141-78-6 - ethyl acetate (Not that much different to the French name).

    I have found that it is often a waste of time talking to industrial suppliers when trying to find ingredients for old processes. Try instead, a specialist art shop that can supply raw ingredients to make paint in the style of Van Gogh or Picasso.

    Nitro-cellulose varnish (lacquer) is no longer used in the quantities that it was and most people use an acrylic or polyurethane varnish - Neither of these would have been available to the Lumière brothers in 1903. It is likely that they used Shellac for the final coating.

  6. #16
    shaz's Avatar
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    You're right, it's not so different .

    I think that i keep cellulose varnish for the Autochrome. I'm gone try to find a specialist artshop like you say, perhaps he would tell me the composition. Just for make the difference with Lumière varnish.

    Thank you for your help .

    Shaz

  7. #17
    shaz's Avatar
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    It will be easier to buy a cellulose varnish rather than make one. .
    It's like the first varnish...Lumière don't invent it, i found an old recipe (about 1850 if i remenber) based on pale latex crepe and benzine... I think that Lumière was very crafty .

    Shaz

  8. #18
    shaz's Avatar
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    Hello everybody,

    Just a little message for say that i have perhaps found a latex for the first varnish.
    An enterprise in France seem ready to sell me latex ADS (air dried sheet). This latex is unsmoke. They tell me the answer tomorrow. I cross all my fingers .
    If it's good i will start the first varnish soon....cross all your fingers with me.

    Shaz

  9. #19
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    *fingers crossed*

    You're doing awesome work... keep it up!
    If you are the big tree, we are the small axe

  10. #20
    shaz's Avatar
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    Thank you holmburgers,

    Cross all your fingers for me for tomorrow.

    Shaz

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