* presents *
DESCRIPTION
venetiancat.com. Specializing in the Techniques of the Old Italian and Dutch Masters. Julia Passamonti-Colamartino “Artista Straordinaria”. * PRESENTS *. Priming a Canvas for Oil Painting. Preparing a Lead Ground Pt I. Materials (Pt 1). Wooden Canvas Stretchers Canvas (fine 100% - PowerPoint PPT PresentationTRANSCRIPT
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* PRESENTS *
Julia Passamonti-Colamartino “Artista Straordinaria”
venetiancat.comSpecializing in the Techniques of the Old Italian and Dutch
Masters
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Priming a Canvas for Oil
PaintingPreparing a Lead Ground
Pt I
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Materials (Pt 1)• Wooden Canvas
Stretchers
• Canvas (fine 100% cotton duck)
• Rabbit Skin Glue (sizing)
• Liquid Nails for wood
• Fabric Scissors
• Spray bottle with water
• Staple Gun
• Canvas Stretching Pliers
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Step 1
• Assemble stretchers, adding a drop of Liquid Nails in the corners to secure frame.
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Step 2
• Cut canvas about 2 inches larger all around than the frame.
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Step 3
• Staple the canvas to the back of the frame using only one staple per side.
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Step 4
• Saturate canvas with water. The allows the fabric to shrink before the final stretching.
• Allow to dry.
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Step 5
• While the canvas is drying, prepare the rabbit skin glue.• Soak granules at a ratio of 16:1. 1Tbsp : 16 Tbsp of water is sufficient for a small canvas (9” x 12”) 2 Tbsp : 32 Tbsp of water for a medium sized canvas (14” x 18”). • SOAK OVERNIGHT so that the beads swell fully.
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Step 6• Once dry, the canvas is
stretched using canvas pliers.
• Staples are placed lengthwise along the perimeter, following the frame.
• Corners are neatly folded and stapled as is loose canvas on the back.
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Canvas is ready for glue size
Notice staple placement.
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Purpose of Glue:
• Rabbit skin glue size stiffens, seals and waterproofs the surface of the canvas so that the paint sits on top rather than soaking in.
• It smoothes the surface by filling in the fabric, and is impermeable to solvents in oil paint.
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The next day…
• Glue granules have swollen and are ready to be heated in order to liquefy.
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Step 7
• Glue MUST NOT be allowed to boil, so it is best to use double boiler method.
(Notice the great pottery in the background ; ) )
Bowl is placed in a pot with an inch of water and heated.
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Step 8
• Glue will have a honey-like consistency when ready.
• Brush onto canvas, being sure to saturate well. Be sure to include the sides and the folded-over part. It is not necessary to paint the back.
• Allow to dry overnight.
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Step 9
• A second coat of glue is applied the next day. This is heated only to a gel-like consistency (not like honey, as before) and forced into the weave with the palm of the hand.
• Glue dissolves with hot water for cleanup.
• Allow to dry overnight.
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Step 10
• Sand once dry using 150 grit extra fine
sandpaper.
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Part II
The Lead GroundRemember: Lead is
poisonous. Be sure to clean hands immediately upon contact and/or to wear gloves.
Lead is most dangerous in a dry state. Be sure to wear a mask if
sanding a painted surface.
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Materials Pt II:
• Flake White Oil Paint, (formerly known as Lead White)
• Japan Drier• Trowel-Shaped
Palette Knife• Disposable Palette
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Step 1B
• Add a few drops of Japan Dryer to Flake White. Japan Drier is important-it will take forever to dry without it.
• Using trowel palette knife, mix into the paint well until smooth.
• Apply to canvas.
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Step 2B
• Using trowel, spread a thin layer of paint/drier mixture on the canvas surface. Start from the middle and work toward the edges.
• Make final smoothing strokes parallel to each other.
• Allow to dry overnight.
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Step 3B
• A second coat is added once the first coat has dried for 24 hours.
• The second coat is applied from the center and smoothed in straight rows perpendicular to the first layer
• Allow to dry overnight.
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Finishing Up:• Sand in between coats if necessary, using
extra fine 150 grit sandpaper and a mask. Lead paint is at its most dangerous in a powdered state!
• Allow canvas to dry for at least one week.• Repeat the process 1 or 2 more times, with
each successive coat perpendicular to the first, until the canvas surface is as smooth as desired.
YOU ARE NOW READY TO BEGIN PAINTING!