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Lesson Plans


Re: Oil Painting on Wood surface

[ Thread ][ Subject ][ Author ][ Date ]
Joan Costa (296joan)
Mon, 19 Jan 1998 19:18:08 -0000


Melissa

I am not sure if I have already sent this to the list or not as I answered
to or three requests for info. to the sender. Excuse me if I ma Repeating
myself

These are the instructioons for preparing wooden boards for painting with
tempera these preparrrrred wood surfaces also have worke d well for me for
oil.
Glue size
Materials: 2 packets gelatine (1/3 oz), small measuere (film spool case),
saucepan, tblsp and flat brush.
Preparation: Put one measure (= 2 packets) of gelatine to soak in saucepan
with 7 measures of water. Heat slowly, mixing to avoid burning, until
thoroughly dissolved and hot not boiling.
Application:
Brush the gelatine solution over the panels thinly coating frot, sides and
back in order to seak«l the wood completely. Wipe off excess gelatine. Allow
to dry thoroughly. (Over night if necessary)
Gesso Ground
This can take a whole day and the sanding betweens coats produces quite a
bit of dust.
Besides the materials used for the glue size you will need a good quality
whiting (Since I can't get whiting I have used a fine plaster of paris with
good results).
Preparation: Prepare a stock just as you prepared the glue size but using
one measure of gelatine to twelve measures of water. Take a small glass of
stock and return to heat with 2 - 21/4 measures of whiting. Mix until
smooth.
Application:
Coats 1 to 3 - Coat the wood (all sides) forcing the gesso into the grains.
If it is too thick add more stock if it is too thin add whiting. Criss cross
the coats. Allow about twenty minutes for drying between the first three
rough coats. Allow to dry three hours. Dispose of leftover gesso.
Coats 4 to 6 - Rehaet the stock and make a new gesso mixture. Apply coats
as before and allow to dry six hours or overnight.
Coats 7 to 9 . Prepare gesso as before but more fluid this time (2 measures
of gesso) Apply as before and wait three hours before continuing.
Coats 10 to 12 - The gesso for these last finshing coats should be even more
fluid, using only one measure of whiting. Try to obtain the smoothest
possible surface with brush or pallette knife.
The next day begin to sand down the panel. You should be able to obtain an
absolutely smooth finish by gradually using finer and finer sandpaper.
Brush off dust as you work and examine panels for imperfections.
I hope this helps.
Joan