Synthetic pigments are created through chemical processes, primarily involving the use of petrochemicals and other chemical reactions. The manufacturing process differs between organic and inorganic synthetic pigments.
Synthetic Organic Pigments
These pigments are typically derived from:
- Coal Tars and Petrochemicals: These serve as the primary raw materials.
- Manufacturing Process: Complex chemical reactions transform these raw materials into pigment molecules. These reactions often involve processes like diazotization, coupling, and condensation, leading to the creation of specific chromophores responsible for the pigment's color.
- Examples: Phthalo Blue, Quinacridone Red, and Diarylide Yellow are examples of synthetic organic pigments.
Synthetic Inorganic Pigments
These pigments are created using simpler chemical reactions:
- Chemical Reactions: Processes like oxidation, calcination, or precipitation are employed.
- Starting Materials: Metal salts, oxides, and other inorganic compounds are common starting materials.
- Examples: Titanium Dioxide (white), Iron Oxides (red, yellow, brown, black), and Cadmium pigments (yellow, red, orange).
In summary, synthetic pigments are manufactured through controlled chemical processes, using either petrochemicals (for organic pigments) or simpler reactions like oxidation (for inorganic pigments) to produce specific colors and properties.
