![]() If the water runs off without steaming, it is too cold.ģ. ![]() ![]() If the water balls up and bounces off, it is too hot. If the water sizzles or steams but does not ball up, it is the right temperature. To test this spray a few drops of distilled water on the metal. Heat the metal with a torch until around 200-250☏. Any speck of dust, dirt or grease (even fingerprints) could show up and ruin the patina.Ģ. Heating the metal opens its pores, which allows the chemical to bond more tightly to the surface.ġ. These patinas are applied to metal that is around 200° as opposed to cold patinas which are applied to the metal at room temperature. A wide variety of colors and effects can be achieved. Hot patinas are one of the most common of the patinas used for sculpture today. Wash off when good even black is achieved and rub with steel wool or scotchbrite pad to bring out highlights if desired. It is durable and easily maintained.Īpply cold with brush or spray bottle to wet surface. It should be used full strength or mixed to a 50/50 mixture. This commercial patina produces a deep black color. Use a fresh solution each time you patina. Note: Liver of Sulfur looses its potency quickly when exposed to air. ![]() Rubbing liver of sulfur to remove it will cause it to have a leaded look that is hard to remove – avoid this unless you specifically want a gray patina. Highlight by rubbing with steel wool or scotchbrite pad if desired to bring out highlights. Wash with water to remove and neutralize the chemical. It can also be used alone without other patinas on top and is very durable and probably one of the easiest patinas to maintain.įor a base coat apply cold with a brush or spray bottle over the entire piece until it is an even gray. It makes a good base for almost any patina. They darken the surface, and if buffed lightly after application with steel wool or a scotchbrite pad, the patina can be removed from the raised areas highlighting the grooves and indentations by leaving them dark.Ĭolors range from browns to warm black. These are used to highlight the surface texture or create a darker undercoat. Use only with transparent patinas or if some surface will show. Burnished surface – produced by rubbing the surface with a burnisher (hardened and polished steel shaped like the convex part of a spoon). Use only with transparent patinas or if some surface will show.Ĥ. Texture can be in one direction or crisscrossing. Wire Brush Surface – A wire brush on a die grinder or angle grinder produces a satiny finish. Clean with a toothbrush or brush with 50% soap and water, then dry and clean acetone very carefully so NO buffing compound remains.ģ. Polish with a cotton wheel on a die grinder using white diamond buffing compound or red rouge.ĭ. Polish to a satin finish using scotchbrite disk.Ĭ. It is a waste of time if you are using an opaque patina, as it will be covered.ī. A polished surface does not work well with cold patinas, as they do not adhere as well as hot ones. Highlights can be polished and recessed areas left sandblasted to create a contrast between the two. Polished surface – the most lustrous transparent look. It is the primary surface used for cold and opaque patinas.Ģ. Sandblasting – produces a matte surface that takes both hot and cold patinas well. Cold patinas do not bite into the surface as well as hot patinas the sandblasted surface will give it some tooth.ġ. Cold patinas should have a sandblasted surface and special care should be made to make sure it is very clean. This is most important in transparent patinas where the surface can still be seen. The surface of the sculpture will affect the patina. Wash your hands and exposed skin after use. Wear gloves to protect the skin from contact with the chemicals.Ĥ. Work indoors with an exhaust system, or outdoors.ģ. These can be found on the Internet, or ask your instructor to see them in class. Read the MSDS (Material Safety Data Sheet) on the chemicals you are using. The chemicals used in patinas can be hazardous to your health. Project #1: Direct Wax Sculpture, Ceramic Shell Casting.Project #2: Sandcasting a Bas Relief Bronze Plaque.
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