Making plaster products kinds of antique bronze, ivory, wood, and others.

Making plaster products kinds of antique bronze, with malonic bone, wood and others.

If desired, the surface of the gypsum products can be put into the form of wood, bronze, iron, etc.

Before toning product is well dried. Drying begins with 25 ⁰C, bring it to 45 ⁰ C, and only at the end - to 55 ⁰ C. It is not recommended to raise the drying temperature is higher and speed up the process. You can simply stand the product in a dry warm place for a few days. Then it twice necessarily impregnated with hot linseed oil or a solution of shellac and rosin technical alcohol. Linseed oil or varnish is applied to a wide-hammers finishing brush. This primer makes gypsum hygroscopic, and on the surface of the tinted spots are not formed. After priming the product once dried. Varnish impregnated plaster over time takes the form, close to the old marble. A gypsum objects covered with shellac varnish, reminiscent of terra cotta.

Just simply and tinting a wax. To this end, the surface of gypsum products coated with a solution of wax with turpentine or gasoline, and a small amount of yellow oil paint. After 2 hours, the product with a soft cloth to a shine.

Finishing the product "on the bone", it is first treated with "soap-boiler." 30 g planed white soap dissolved in a liter of hot boiled milk, cooled and bristle brush applied to the surface. After drying, polish the product nitrovarnish lightly tinting deepening yellow oil paint. To the surface is not shining, it is rubbed with talc.

When patinated plaster products (color of "bronze") used oil paints, pre-arranging them by color. For example, the brown tones it is recommended the following composition (in parts by weight): ocher - 11, natural sienna - 33 black - 28, turpentine - 70, desiccant - 70. greenish-brown tones: ocher - 120 sienna natural - 196 soot - 9, greens - 6, turpentine - 200, drier - 200.

The paint is applied in 3 layers. The raised portion of the article is coated with a liquid formulation, deepening - thick. The first paint layer must be light. After drying it lightly treated with fine sandpaper and wipe with acetone. The second layer must be dense and darker, which is introduced in the small number of bronze powder. After drying of the second layer is applied to the third. Its liquefied turpentine, which is dissolved in beeswax ( 40 g on 500 g solvent). Wax makes the paint matt. Before the final drying of the third layer it slightly to remove on the protruding parts of the relief. Then wipe the surface with a soft flannel tinted, powdered with talc, and in places that are desirable shade - with a mixture of talcum powder chromium oxide. To enhance the effect of toning convex portions can priporoshit mixture of graphite powder with a bronze powder.

To simulate dark bronze is recommended to use light or golden ocher, sienna natural, natural umber, black; for light bronze - natural umber, black or natural sienna, ocher and golden light, chromium oxide or cobalt green, white lead or zinc.

Toning gypsum products "under the old bronze" is almost identical to the real production of the patina bronze:

1.   First, gypsum product is impregnated with linseed oil and left overnight. Then, it is coated with a mixture of bronze powder, diluted varnish is dried for 20 minutes and the second layer mixture. When it dries, cover the surface of the product in the following composition: 10 g silver nitrate dissolved in 100 g acetic acid and diluted 300 g water; to produce a particular tone, you can enter the corresponding pigments. Thin bronze powder layer deposited on the product is oxidized with the solution. The more concentrated the solution, the oxidized film is harder. The processed product is either rubbed the velvet cloth, or covered with wax dissolved in turpentine.

2.   To make the figures form a plaster antique bronze, n rigotovlyayut two solutions: 1) linseed oil is heated with caustic soda solution, soap, salt solution was added and boiled until release pellets soap; the solution is filtered through linen cloth squeeze the soap, dissolve it in distilled boiling water and filtered. 2) 4 1 copper sulphate and iron sulphate dissolved together in distilled water, tsedyat, part of the solution is boiled in pure copper a bowl and pour the first solution to form a precipitate. Separating the ragged green sludge is poured into it the rest of the solution and boil again; after some time the liquid is drained, washed precipitate (copper soap), first hot, then cold water, finally squeezing it between the linen cloths dryness. Then 1500 is boiled linseed oil in a clean 375 minute litharge, filtered through a linen cloth and put in a warm place; when sludge oil 468 250 copper alloy with soap obtained above, and 156 in white porcelain dish of wax, with moderate heating (preferably in a water bath). This mixture is applied by brush to heated to 70 ° plaster subject; as a result of the cooling lacquer is no longer absorbed, the object is heated again and again varnish, until the object is not be satisfied with them. Finally, put it on a moment in the heated chamber, and then put into the air, until there is no smell of varnish rubbed with cotton or soft linen cloth and some places deposited a small amount of bronze or gold powder.

To simulate iron casting gypsum product can be covered with dark gray paint, consisting of ocher, black and white paint on the drying oil mixed with a desiccant. After drying the product is wiped dry with a mixture of graphite, mummies, ocher, white lead, ultramarine.

To make the shiny surface of the gypsum product, its composition is coated with 5 parts of glycerin and 95 parts of silica glue.