Genuine Artists´ Οil Bronzes, are formulated based on real metal pigments for painting techniques in oil colours. 5 colours are available: rich gold, rich pale gold, pale gold, copper and silver. Schmincke Genuine Artists' Oil Bronzes contain bronze or aluminium pigments. Therefore they are very light fast, more opaque and more brilliant than other metallic effect colours made of pearl lustre pigments. Only suitable for indoor objects!Iridescent metal effect on oil paintings or other pre-primed surfaces, such as wood, metal or gypsum; use only in combination with bronze medium .When used on absorbent surfaces, we recommend an additional pre-treatment with turpentine substitute and thinned bronze medium. Handling: Mix 3 parts Oil-Bronze and 2 parts bronze medium with a painting knife - shortly before application. If requested, thin with e.g. turpentine substitute; dries wipe and water-resistant. Colour layers remain soluble to oil of turpentine (50102) or turpentine substitute after drying.