Tutorial 6 - Craft recipes.pdf

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TUTORIAL No. 6
Recipes for Milk Paint, Tempera
and Casein Plastic
By: Frater Mea Fides In Sapientia
Alpha Orionis
28 Dec, 2013
Milk Paint, Tempera and Casein Plastic recipes...
One day, Leonardo daVinci boiled together glue, eggs, vegetable dyes, saffron, poppy dust, and whole
lilies (among other things), and created a mixture that hardened into what he described as “plastic
glass.” Leonardo painted different surfaces with many layers of his mixture and discovered that when
the mixture dried, it could be carved into useful objects such as chess pieces, knife handles,
candleholders, and salt shakers.
For centuries the recipe for Leonardo’s plastic glass was lost to history, but in 2004 an Italian scholar
searching through Leonardo’s writings discovered all of the ingredients Leonardo used to create his
plastic glass—and it worked! Alessandro Vezzosi followed Leonardo’s recipe and painted cabbage and
lettuce leaves, paper, and even ox intestines, just like Leonardo did 400 years before. When the mixture
dried, it turned to Leonardo’s “plastic glass.”
While this recipe doesn’t involve boiling lilies or eggs, combining the following ingredients over heat
will result in a natural plastic that you can shape, dry, carve, and paint, very similar to Leonardo’s
plastic glass.
PLASTIC GLASS
What you’ll need
- 1/2 cup heavy cream
- up to 1/2 cup white vinegar
What to do
1 Pour the cream into a saucepan and heat. Do not let it boil.
2 When it starts to simmer, stir in two spoonfuls of vinegar. Slowly simmer over medium heat. You will
start to see yellowish lumps (curds) forming. These curds are a mixture of fat, minerals, and the protein
casein (a natural plastic).
3 Keep adding vinegar and stirring until the liquid turns mostly to curds. Take it off the heat, let it cool,
then strain the liquid from the casein curds and rinse the curds in
cool water.
4 Knead the curds until they stick together and have the consistency of a ball of dough. Then shape it
any way you like and let it dry overnight.
EGG TEMPERA PAINT
What you’ll need
• dirt and two rocks
• egg yolk
• brush
• painting surface
What to do
1 Here’s an easy way to make your own paint. Go outside and find some interesting colored dirt, or
even a crumbly piece of brick. Scoop up a little, let it dry overnight, and then crush the dirt between
two rocks so it’s powdery.
2 Mix the dirt with some egg yolk, and paint it on a piece of paper, a board, or even a flat rock. Try
experimenting with dirt taken from different locations—you’ll be surprised at the variety of colors
plain old dirt can have.
3 Try other ingredients: the pistils or stamens of daylilies, for example, will make a bright yellow paint,
as will crumbled saffron. Charcoal will make a grayish black paint. Experiment with natural ingredients
you can find around your house, yard, or park. Just remember that in order to work well, they need to
be crushed to a fine powder, then mixed with the egg yolk.
MILK PAINT
Materials
Lemon
1 quart skim milk
Sieve
Cheesecloth
Dry color pigment or artists' acrylic paint. (Or grind your own as above)
Steps
Step 1 Mix the juice of a lemon with 1 quart of skim milk in a large bowl. Leave the mixture overnight
at room ++temperature to induce curdling.
Step 2 Pour it through a sieve lined with cheesecloth to separate the solid curds from the liquid whey.
Add 4 tablespoons of dry color pigment (available at art-supply stores) to the curd; be sure to wear a
mask, and stir until the pigment is evenly dispersed. Artists' acrylic paint also can be used in place of
powdered pigment.
Step 3 Add it one drop at a time, and stir constantly until you achieve the desired hue. Whether
pigment- or acrylic-based, milk paint will spoil quickly, so it should be applied within a few hours of
mixing. Rest assured, its sour smell will disappear once the paint dries. If you prefer, you can purchase
milk paint rather than make it yourself.
Homemade Gesso:
Couple things about this it is a little rougher than normal gesso but it does sand nicely. Because of the
baby powder it will be a little chalkier when sanding so use a fine sand paper. Cure time is 24 hours
but you can speed it up with a hair dyer or a heat gun.
1 part white glue (I used cheap white glue from the Dollar Store - you can also use PVA glue or
Elmer's)
3 parts water (since I used the cheap white glue I should have decreased the water to 2 parts)
6 parts baby powder (since I used way more water than what I should have, I used more baby
powder. I did not measure I tilted the baby powder container and squeezed - scientific I know)
I added some Titanium White from the an almost empty 2 oz. tube of Liquitex (there was maybe a
TBSP left in it.)
I mixed everything in a air tight container the constancy is like a pancake batter - it will settle (like
normal Gesso) so you will need to mixed it before use. Surprisingly it takes paint really well, it also
sands nicely. It also way cheaper than "real" gesso
For a somewhat Durable sculpting medium, on-the-cheap...
Baker's Clay...
8 cups flour
3 cups salt (can be swirled in blender or food processor to make finer)
3 cups warm water
optional 2 T. cooking oil
(proportions can be varied a bit,,,I usually use 2 part flour, 1 part water. 1 part salt)
Mix flour and salt together, then add water and oil, kneading 5-10
minutes till smooth. If too wet, knead in more flour; if too dry, add a bit
more water. Wrap with plastic wrap and let set at room temperature
at least 1-2 hours. Letting it set for a day or even longer allows the salt
to partially dissolve, making a smoother dough.
Shape as desired. Air dry or bake in oven at lowest
temperature. (Get it thoroughly dry)
Paint with acrylic or watercolor paints. If desired, dip or spray with glaze.

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