Lake Preparation and Lipstick Development from Red-Purple Bracts of Paper Flower

Abstract

This research aimed to study the optimal condition of natural color extraction from the bracts of Bougainvillea glabra and to develop a cosmetic product containing color lake from the red-purple bracts. The dye extraction was optimized for three conditions (solvent concentration, solid-liquid ratio, and extraction time) and analyzed by spectroscopy. The obtained dye was synthesized into lake pigments in 7 different salts. Then, the red-purple lake was investigated by colorimeter and Fourier transform infrared spectroscopy (FTIR). Lipstick containing the pigment was developed. The optimal condition for dye extraction from the bracts was with 50% ethanol, a solid-liquid ratio of 1:30 g/mL, and an extraction time of 30 minutes. Interestingly, the paper flower lake pigment was only prepared from aluminum chloride. The whiteness (L), redness (a), and yellowness (b) of the aluminum lake were 37.51 (±1.62), 10.23 (±0.12), and 12.65 (±0.22), respectively. The infrared spectrum of the aluminum lake sample appeared at a wavenumber of 1624.38 cm-1 that indicated carbonyl group (C=O stretching) connected with amide bonds. All of the lipstick formulations containing aluminum lake in this experiment were not sweaty. The lipstick consisting of 1% red-purple lake had the closest color with the master formula (∆E=1.24), aand its melting point was 65.3 (±0.3) °C. In conclusion, this research found a novel cosmetic ingredient to overcome the lipstick sweating problem.

Keywords

• color lake
• bougainvillea glabra
• red-purple bract
• lipstick