Alkanet root powder
Description
Alkanet Powder - Reddish-violet natural colorant for ruby, pink, grey, or purple shades in oil-based preparations.
Alkanet Powder is obtained from the ground root of the Alkanna tinctoria plant, a traditional source of a fat-soluble red dye. It imparts a ruby red color to oil preparations, with nuances of pink, grey, blue, or purple, depending on the amount used and the alkalinity of the formula in which it is incorporated – a unique trait that makes it a natural colorant particularly valued in soapmaking, where it visibly reacts to pH.
It is a versatile colorant used in cosmetics (tinted oils, balms, body butters, creams) as well as in soaps, candles, and hair dyeing, where, combined with red henna, it enhances auburn/mahogany highlights.
Ingredients (INCI): Alkanna Tinctoria Root Powder
Technical Characteristics
- Appearance: Reddish-brown powder, characteristic odor
- Solubility: Miscible in oils (liposoluble colorant); insoluble in water. To extract the pigment (alkannin), preparing an oil macerate is recommended.
- Quality: The pigment responsible for the color is alkannin (a naphthoquinone), which is pH-sensitive: shifting toward red in an acidic medium, and toward blue-grey in an alkaline medium.
- Indicative dosage: 1-10%
Properties and Benefits
- Natural, fat-soluble colorant offering a wide spectrum of possible shades (pink, ruby red, grey, blue, purple), depending on dosage and formula pH.
- In soapmaking: shades ranging from light blue to dark blue-grey, or purple to plum tones.
- In candles: pink to raspberry red color.
- In oils, creams with pH below 6, anhydrous creams, balms: pink to raspberry red color.
- In hair dyeing: combined with red henna, it enhances auburn/purple highlights.
Applications
- Tinted oils, balms, body butter, sticks, creams.
- Cold process or melt & pour soaps, candles.
- Hair dyeing, in combination with red henna.
Formulation Guide
- Preparing an oil macerate: Use 100 ml of vegetable oil of choice and 10 g of alkanet powder.
- Allow to macerate for up to 7 days, shaking occasionally.
- Filter using a coffee filter paper or dense sieve, then incorporate the resulting tinted oil into your formulation.
- The process can be accelerated by heating the oil and powder mixture in a water bath at a maximum of 50°C for up to one hour.
- In alkaline pH formulas (e.g., cold process soap during the saponification stage), the resulting color is blue-grey; for red/purple shades, the final formula must have a pH closer to neutral/acidic.
- A small test batch is recommended prior to larger production to determine the dosage that yields the desired shade, results vary based on oil type and pH.
Usage Safety and Storage
- Profil: Natural colorant with good skin tolerance at recommended dosages.
- Precautions: External cosmetic use.
- Storage: Store in a closed container in a cool, dry place away from direct sunlight.
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