This 5 gram bottle of liquid burnished gold is formulated in Germany and contains 16.4% gold and has a satin appearance that is similar to Roman Gold. It needs to be stirred with a toothpick or similar object before application. It is easy to apply by using a clean brush to avoid contamination and then should be fired at 018-017. To bring out the satin patina, burnish with a burnishing brush, burnishing pad or burnishing sand.California residents see Prop 65 Warnings