Pigment Metal 3, known as metallic gold, is chemically classified as an inorganic colorant. This pigment consists of finely powdered metallic gold and is widely used in various industrial and cosmetic applications.
Chemical Composition and Structure
Pigment Metal 3 is an inorganic compound composed of pure metallic gold (Au). The gold particles are finely divided to create a pigment that retains the metal's natural luster and reflective properties.
Physical Properties
This pigment typically appears as a fine, shiny gold powder. It has high density and excellent covering power. Pigment Metal 3 is known for its outstanding chemical stability, resistance to light and heat, and inert nature, making it suitable for long-lasting applications. The pigment's metallic nature provides a unique reflective quality and a luxurious appearance.
Industrial Production Process
- Preparation of reagents. The main raw material is pure gold.
- Cleaning of gold. The gold is cleaned to remove impurities and contaminants. This process may include acid washes and chemical treatments to ensure the high purity of the metal.
- Melting. The pure gold is melted in a crucible at high temperatures. The melting process ensures that the gold is fully liquefied.
- Atomization. The molten metal is atomized in a cooling chamber. This process involves the use of high-pressure gas (such as argon or nitrogen) to break up the liquid metal into small droplets that rapidly solidify into fine particles.
- Collection. The powdered gold particles are collected in a powder collection system.
- Grinding and sieving. The collected particles are further ground and sieved to ensure a uniform and fine particle size.
- Washing. The gold powder is washed with appropriate solvents to remove any surface impurities.
- Drying. The washed powder is dried at controlled temperatures to remove residual moisture.
- Classification. The dried powder is classified to separate the desired particle sizes using sieves or air classifiers.
- Stabilization. The Pigment Metal 3 powder is stabilized to ensure its stability during transportation and storage, preventing oxidation and aggregation.
- Quality control. The Pigment Metal 3 undergoes rigorous quality testing to ensure it meets standards for purity, particle size, and safety. These tests include chemical analysis, spectroscopy, and physical tests to determine rheological properties.
What it is used for and where
Cosmetics
Restricted cosmetic ingredient as IV/133 a Relevant Item in the Annexes of the European Cosmetics Regulation 1223/2009.
Cosmetics - INCI Functions
- Colorant. This ingredient has the function of colouring the solution in which it is inserted in a temporary, semi-permanent or permanent manner, either alone or in the presence of the complementary components added for colouring.
Pigment Metal 3 is widely used in luxury cosmetic products such as eyeshadows, highlighters, lipsticks, and nail polishes due to its brilliant metallic gold color. It provides a unique shimmer and is valued for its non-toxic nature and skin compatibility.
Industrial Applications
Paints and Coatings: In the paint industry, metallic gold is used to create high-end decorative finishes. Its stability and reflective properties make it ideal for enhancing the aesthetic appeal of various surfaces, including furniture, frames, and art pieces.
Plastics and Polymers: This pigment is employed in the production of plastics and polymers to achieve metallic gold effects. It is commonly used in luxury packaging, automotive components, and consumer goods that require a premium appearance.
Ceramics and Glass: Pigment Metal 3 is used in the production of ceramics and glass to impart a rich gold color and a reflective finish. It is particularly valued in decorative ceramics, tableware, and luxury glass products.
Inks: The pigment is also used in printing inks for high-quality, gold-colored prints. It ensures vibrant and long-lasting metallic effects, commonly used in premium packaging, invitations, and other special print materials.
Safety
Pigment Metal 3 is generally considered safe for use in consumer products when handled according to proper safety procedures. As a precious metal, gold is non-toxic and inert, posing minimal environmental risks.
Molecular Formula Au
Molecular Weight 196.96657 g/mol
CAS 7440-57-5
EC number 231-165-9
Synonyms:
Pigment Metal 3
Gold Leaf
CI 77480
