Oil base of the oldest, and most popular, it is mainly used for canvas, but also applies to wood and so on. Base oil and the oil layer is basically a rubber-soled two parts. The traditional end of material for animal hide glue (mostly rabbit), bottom paint is oil-based paint (linseed oil turpentine 15 g 15 g lead white 25 grams). Production methods are: heating and melting the skin glue watered, while the hot glue, when applied to the canvas, dry it and then coated with white oil base paint. At the end of the oil paint to as little as possible to ensure the next layer of solid color. Coated with a layer of bottom paint, the canvas can be used, if needed smoother surface, should erase the canvas, so paint the bottom two to three times to be painted. Oil base canvas ready to be put to use for several months, and longer, and the best time for six months.
Oil absorbent base foundation is weak, the surface of delicate, flexible and strong, impact-resistant, resistant to moisture. Drawback is the lack of permeability, no gum base coloring, in a long time will lose flexibility, because of the color layer embrittlement and cracking, or even fall off. Also easy to turn yellow oil base.
Produced from synthetic rubber, the modern artist as a multi-purpose white latex primer. Practice is: latex diluted with water painted on a canvas of two to three times, and then add a small amount of water, latex, plus lithopone (You can also add color inside the oil), stir evenly coated or scratch on the canvas. To be dry, with oil paint (usually white, can also add a little ultramarine, red and other earth tone gray) can be a thin layer of brush.
Method:
1 Brush latex on the water, the ratio of 1:1
2 First dry brush latex on water lithopone, the ratio 1:1:1
3 Has been repeated on the water lithopone latex brush, I brush 4, is not expected to leak up.
4 Finally a brush latex on the water, the ratio of 1:1
Note: To brush in front of it before we have to wait and then a dry brush
If you suspect trouble, direct buy Marley brand bottled at the end of production of material on the line. (1) Adhesive
Foundation for the production of plastic canvas class are: animal glue (glue, hide glue, etc.), plant resin, latex, latex and other synthetic white.
(2) Oil
For the production of oil base canvas of oil are: turpentine, linseed oil, medium oil glazing agent.
(3) Supporting material
Soft supporting material: pure linen, semi-linen, cotton canvas and so on.
Hard-bearing materials: wood, plywood, fiberboard, cardboard, metal panels.
(4) Fill material
Big white powder, also known as whiting, Spanish white, Paris white, clay, etc., the main component is calcium carbonate. Large white powder on the market is 60% and 40% calcium carbonate magnesium carbonate mixture. Material can only be done at the end with glue binding, combined with the oil if the child will become greasy. Can replace large marble powder white powder.
Lead white powder (lead carbonate): ancient Chinese officials powder, Hu powder. European painters of ancient foundation, or use it to produce more white paint. Due to toxic, modern artists have been rarely used.
Gypsum (calcium sulfate): do more with natural hydration base to plaster or plaster. Dense than the chalk, bright, but poor flexibility. In wood and other hard plaster base supporting materials do better.
Titanium dioxide (titania): There is a strong coverage, often with large white powder mix.
Lithopone (zinc sulfide and barium carbonate): scientific name lithopone. Some experts do not advocate the materials used alone lithopone, with large white powder mix.
(5) GESSO finished Primer
"GESSO" Italy is Italian plaster or plaster, paint is finished at the end, good can be directly applied to the stretched canvas. The traditional rabbit skin glue GESSO by the large white powder and white pigment (titanium dioxide or zinc white) mixture. Modern Synthetic (acrylic) and fill material synthesis of propylene GESSO, both can be used for acrylic painting can also be used for painting. It dries quickly, does not crack, easy to operate. The finished product on the market bottom paint with white, red and silver soil.
(6) supporting material
Glycerol-style honey: add a little to increase the flexibility of the adhesive.
Alum: one kilogram glue added 10 g alum, to moisture.
Formaldehyde: with 4% formaldehyde solution spray both sides of the canvas, to corrosion, pest control, anti-wet.
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