Yellow Color Extraction from Annatto (Bixa orellana) Seeds
Annatto, derived from the seeds of Bixa orellana, is a well-known natural source of yellow to orange pigments, primarily bixin (oil-soluble) and nor-bixin (water-soluble). It is widely used in food, cosmetics, and textile industries.
Collection & Preparation
- Harvesting: Annatto pods are collected when fully ripe and dry.
- Seed Separation: The red-orange seeds are extracted from the pod.
- Cleaning: Seeds are washed to remove dust and debris.
- Drying: Air-dried or sun-dried for better pigment retention.
Extraction Methods
- Water Extraction (For Water-Soluble Nor-Bixin)
- Oil Extraction (For Oil-Soluble Bixin)
- Solvent Extraction (For High-Purity Pigments)
Filtration & Purification
- Extracts undergo centrifugation or filtration for purity.
- pH and temperature adjustments help stabilize the pigments.
Applications of Yellow Pigment
- Food Industry: Natural coloring for cheese, butter, beverages, and snacks.
- Cosmetics: Used in lipsticks, skincare products, and hair dyes.
- Textiles: Traditional dye for cotton, wool, and silk fabrics.
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