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Orange color extraction from eucalyptus leaves involves isolating natural pigments such as flavonoids, tannins, and oxidized polyphenolic compounds that develop orange to reddish hues, especially upon drying or chemical interaction. The process starts with harvesting mature eucalyptus leaves, followed by washing, drying, and grinding them into fine powder to enhance surface area. Extraction is typically performed using solvents like ethanol, methanol, or hot water sometimes with mild acid or alkaline treatment to trigger pigment development and improve solubility. Techniques like ultrasound-assisted extraction (UAE) or maceration can be used to increase yield and efficiency. After filtration, the extract is concentrated and can exhibit shades from golden-yellow to deep orange, depending on leaf maturity and extraction conditions. This natural colorant can be applied in textile dyeing, artisanal cosmetics, and plant-based inks, though it's less commonly used in food applications due to variability in color stability. Controlling pH, temperature, and oxidation during extraction is key to achieving a consistent orange hue.
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