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Pitch recipe


#1

Pitch recipe Finaly, I found time to translate the recipe. I hope
my english be understood by all Orchideans!

  • 8,5 Kg of sealing wax (in Argentina, it is sold in “cakes” of
    1 kg each. It’s the same sealing was used by the lawyers). * 500
    grs ( � Kg) of ordinary depilatory wax * 4 ordinary white long
    candles * Tar / Asphalt (the aspect is like black chewing gum!):
    500 grs ( � Kg) in Argentina, I buy it in the shops specialized
    in houses building. It is used for sealing the roofs, etc… *
    Liquid Vaseline : 200 grs * 1 spherical metal bowl (as the ones
    used to batter eggs) not too big, or instead, a rectangular
    metallic pan/mould. * A metallic (zinc) bucket * A woodstick (or
    similar) to mix ingredients

ATTENTION: Don’t let the ingredients boil. Take the zinc or metal
bucket and put inside all the sealing wax broken and the
depilatory wax (you have to broken the “cakes” with the hammer
first). then, put it on soft fire (kitchen or camping gas) and
start to liquefy / melt. When melted, add the candles (without
the thread) and the tar. When melted, add the Vaseline. At every
time, you can mix the ingredients with a stick of wood.

Let the recipe cool in the bucket, it will become hard. Then
make the following test to know if your recipe works. Everything
is fine, if you are able to mark the pitch with your nail (maybe
to sink your nail if you wish a softer pitch). If you sink your
finger in the pitch, it’s too soft, you have to add sealing wax
(maybe 100 grs). It it’s too hard, you have to add a little bit
more vaseline (not much, maybe 2 soup spoons). If everything is
all right, then you put your bucket on the fire again and slowly
let it melt. When it’s liquefied, you put it in a metallic mould,
let it cool and it’s ready.

Tricks: - Keep in a little tin can some pitch so you have it for
filling your repouss� workpiece (to work the piece when you have
to turn it: to work in the concave or convex face, it depends).
You just will have to melt the pitch contained in the can and
then fill your piece. - You can make to kinds of pitch, adding
more vaseline to have a hard pitch and a soft pitch (for winter
and summer, if you have as in Buenos Aires a big difference of
temperature between seasons). I use soft pitch like some of you
use lead: to give volume to my pieces. Pitch is easier than lead
and you have more possibilities of volumes. - I prefer the half
sphere bowl as a mold for putting the pitch. It’s easier to
manipulate. The mold will then be leaned by a thick leather belt
that you close with screws or wire, so it can’t be opened (you
have to close the belt as if it was around your waist, but it has
to fit in the down side of the mold), and sustain it so that it
can’t be opened), - RESPECT THE PROPORTIONS OF THE MATERIALS,
IT’S VERY IMPORTANT !

If you have comments or if you don’t understand my translation,
you can contact me off line. This recipe is very useful and easy
to do. My professor, Jorge Casta��n, is the one who gave me it
and who taught me how repouss�. So by the way, thank you Jorge! He
speaks spanish, and for those of you who can write in spanish,
here you have his e.mail adress:

castanongortari@interar.com.ar

We also make our own punches. If you want to know how, you can
contact me or my professor. It’s easy, but not very funny.

Best regards, and I hope you will try the recipe, because it
works.

CAMILA

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#2

Oh man, what a difficult pitch recipe,

Here is my recipe for work room temperature 20 Degr C.

2 Kg Tar / Asphalt
1 Kg Portland cement or  plaster.
and some vegetable oil  25 cc only when you are working in a cold place. (15
degr C)

Melt an mix together. and poor into a bowl.

When it hotter 30 degr C or you need a harder pitch ad more
cement or plaster. 1Kg tar to 1 Kg cement.

To work with pitch heat u your repouse part an melt it in the
pitch. to remove heat up again. If it is to sticky rub your
repouse part in with oil before melting it in, it will come of
easier. cleaning your part by burning the pitch of or remove with
petrol or gasoline.

Martin N