Lustre is a paint that forms a very thin metallic film on the surface of ceramics and produces iridescence due to the interference of light. Luster is classified into colored luster and colorless luster according to its color. Color lusters include iron, copper, manganese, cobalt, cadmium, uranium, gold, platinum, etc. Colorless lusters include aluminum, zinc, zinc, cobalt, cadmium, uranium, gold, platinum, etc. Colorless lusters include aluminum, zinc, lead, tin, bismuth, titanium, etc. Some colorless lusters show a very dark iridescence due to the interference of light by the thin film. Lusters are generally made by dissolving metal resinates in an appropriate solvent, while precious metal lusters are made by mixing gold and platinum solutions with bismuth lusters. This technique was first used in Mesopotamia in the 9th century and flourished in Persia in the 10th century, but was most common in Egypt. Later, with the expansion of the Islamic world, it spread to the Mediterranean coast, where the Spanish-Portuguese technique still survives today. The Spanish-Portuguese technique was used to give ceramics a strong metallic sheen and to satisfy the common people who were unable to use metal ware.
